Nest thermostat blowing 3 amp fuse. The unit was off and the 3 amp fuse was blown.

Nest thermostat blowing 3 amp fuse The 3 amp fuse on the air handler (ARUF) control board blows instantly as soon as I turn on the breaker. The fuse is still blowing. The 3amp fuse blew a few days ago, so I replaced it. The unit was off and the 3 amp fuse was blown. Look at the fuse location of different heat pump brands: Payne: The fuse is on the lower part of the electric panel. Latest News. The metal frame and wires touching can create a much higher voltage than the wires handle, causing the fuse to blow. 8. View Profile I've had multiple carrier/Bryant units pop the fuse due to the defrost thermostat wire rubbing against one of 3 amp fuse blew, so I replaced it, and it did the same thing. 5 ton heatpump system installed last summer. I suspect a bad board but owner claims last guy replaced board. 39,229 Satisfied Customers. So far i have disconnected all sensors and thermostat. Just noticed A/C not. I checked and the furnace was Heat Pumps and Electric Home Heating - Goodman 3amp fuse blows on cool call or defrost - Hello, I have a Goodman Condenser GSZ140601KE with Air Handler ARUF61D14AC controlled by Honeywell My Carrier FY4A keeps blowing the fuse it is connected to a NEST thermostat after about 3-4 mins it blows the By chatting and providing personal Keeps blowing the 3 amp fuse. Its an old Goodman. Probably blew the 3 amp fuse on the printed circuit board if there is a fuse there, most have a fuse. 20 amp fuse--instantly, as soon as you turn on key. I disconnected all control wires and jumped r and w. Incorrect Fuse We ran through several fuses while trying to figure out what's going on, but it wasn't just the AC blowing the fuses, the furnace was also causing fuses to blow. My purple 3 amp fuse keeps blowing. Well new years eve it blew fuse and fuse continued to blow soon as power was turned back on. After turning the power back on I can see the red LED's on the board are blinking. After some troubleshooting, I narrowed the issue down to the thermostat. I can manually engage the contactor and the ac powers up no problem, but the second I reconnect the thermostat to the wall, the 3 amp fuse blows. I have measured y to ground at the condenser and it is an open, and i have measured C to ground at the condenser and its a short- about 4 ohms. All wires are tight and last year we replaced bad inducer and transformer. Heat (whatever your thermostat calls it) and initiated the heat strips and blows the fuse. funny thing is I replaced the fuse and it TL;DR: The 3amp fuse between the thermostats keeps blowing now that we changed from A/C to heat. I noticed the fuse blew again, Im going to show you how to fix this Problem with just a screwdriver and maybe 5 3 amp fuses and we will fix the 3 amp short im just making this video for Nest Thermostat Fan Won’t Turn Off [Solved] Read More » September 9, 2023 TROUBLESHOOTING GUIDES. Originally thought it was the 1. Fuse in furnace keeps blowing when cooling starts. Rick Mather. I’ve check the outside unit and fixed the two possible exposed wire. Heat pump keeps blowing 3 amp fuse inside of thermostat controller. --tractor has been operating perfect. Bart Jay. bebell123. I replaced it and about 5 minutes later it blew again. ” The following are some of the most prevalent reasons for blown 5 Amp fuses: Low Refrigerant Level. I let the unit run the A/C. Upon further inspection we discovered the 5 1. The thermostat has wires in it, which, if they touch the metal frame of the furnace, can cause the fuse to blow. Our HVAC guy wired the furnace for a C wire, but our 'stat was set for 2-stage heat. 20,727 Satisfied Customers. NOTE in many systems the common is also grounded. If it does not, there is a skinned wire between thermostat Ecobee Smart Thermostat blowing 3 amp fuses in furnace. The fuse goes even when no heat is requested. It has no issues with fan and cool calls. Turned off the AC on the thermostat, but left the fan running. Does not blow fuse without the white wire connected. I checked the wires and the thermostat. I have changes the setting of the thermostat from auto to cool. Running a new t stat wire would be challenging based on a few factors Fuse blows in heat or cool mode. I disconnected the outside unit wires from the control board and it By chatting and disconnected the outside unit wires from the control board and it still blew a fuse. Heater heater? What have you tried so far? My defrost control board on HEIL (international Comfort Products) keeps blowing the 5 amp control voltage fuse. Part of your I have a Payne furnace, model number PG95SAS60100CBAA. Show Printable Version; 01-28-2014, 01:28 AM #1. Not the thermostat itself. History; AC went down, replaced said fuse and unit worked again for a few days, then the fuse failed again. Took the panel off, and the fuse was blown again. Customer: 3 amp fuse is blowing, would a bad capacitor on the AC cause this? Contractor's Assistant: Replaced fuse, cool keeps blinking on the thermostat and then the fuse blows on the board after several minutes. My first suspect is always the thermostat wires. Error I recently installed an Ecobee 4 and I'm having some problems. 2012. ) Take off all the low voltage wires from the board. I replaced the fuse and the thermostat light came on again. The weather has been oscillating between the 30s F and high 80s F the last few weeks. You may have a short in a low voltage circuit. Hi there, hope I'm in the correct area to post this question. When I wrap the 2. The fuse just keeps blowing. Also, for the purpose of troubleshooting, get a reset table fuse. Customer: Can a faulty thermostat cause the 3 amp fuse to keep blowing in the control circuit of my HVAC unit? Contractor's Assistant: What's the brand and model of your thermostat? How old is it? Customer: The brand is a carrier and the model number is ***** Contractor's Assistant: How long has this been going on with your Carrier thermostat? What have you tried so far? Heat pump keeps blowing 3 amp fuse inside of thermostat controller. Is my problem the wiring from the thermostat or the thermastat itself? Answered by Rick Mather in 1 hour 14 years ago. Hello, I have been having some issues with my ac at home. I have a furnace I keep blowing the 3 amp fuse. Nests are notoriously fucking terrible, and twice as bad when they don't have a common. As soon as Y1 is connected back to board it blows again. Last winter was blowing 5 amp board fuse until we set to fossil fuel only. Keeps blowing the 3 amp fuse. Have found no dead shorts in the wiring, including the AC unit outside Contractor's Assistant: Did you double-check the thermostat? And what about the pilot light? Customer: It has no pilot light, and the thermostat is blank. HVAC Technician: André R. I was installing a Nest Thermostat and at one point forgot I had turned the power back on and so I blew a fuse while installing the wires. That's why "in theory" it doesn't need a common wire to act as the neutral wire to power the thermostat. Industrial Customer: Similar problem here: blowing 3amp fuse on furnace (carrier) control board as soon as I turn the unit back on. Problem began about a week ago when we went to adjust the thermostat and the digital display was blank. As the title states, I have a blown 3 amp fuse on the control board located in the air handler. My Lennox Air Handler keeps blowing 3 amp fuses, They are good, Yes, The fan runs I working on a carrier 48tjd028 series 660qa and the 460v 3 amp fuse blows after about 5 minutes and cant figure why this keeps happing. But stranger things have happened. Any help or advice for where to start trouble shooting would be greatly appreciated! Thank you! Carrier 9200 blowing 3 amp fuse within 20 seconds of inducer blower starting. any help would be greatly appreciated tried to turn on the ac the other day and nothing. As with most air conditioner problems, a multitude of conditions might be causing your AC unit to “act up. It keeps blowing the 3 amp fuse immediately when I put it in, what do you reccomend I do next? By chatting and providing personal info, you understand and agree to My thermostat is. The second and the third time it lasted much shorter. If the fuse doesn't blow, thermostats sr 506-4 fuse 6 amp fuse 6 amp fuse 6 amp fuse 6 amp fuse 6 amp fuse 6 amp fuse 6 amp xxrwrwrwrwrwrw end switch thermostats (24 vac) 120 vac priority zr hh nhnhnhnhnhnh nh zone6 zone 2 power zone 1 zone 3 zone 4 zone 5 zone 6 led indicators zone 6 priority off on priority to: "tt" on boiler jumper 24 vac com see note I have a mr heater garage heater and the 3 amp fuse blows as soon as power is applied. Flipped the breaker for the furnace to 'ON' 8. Disconnected thermostat, still there. Any ideas? 1986 Chevy C10 keeps blowing 25 amp AC/Heater fuse. I dont understand why the cool works fine but the heat is blowing the fuse. Carrier Model FB4CNF. I just replace the 3A fuse for third time in three weeks. If you disconnect the wires on the furnace and the fuse still blows, the problem is in the board. After much diagnostic work over the past 3 days, my husband tested everything multiple Thermostat keeps blowing the 3 Amp fuse, Model number 1f83c-11np. Customer. I looked in the unit and found that the 3 amp fuse had blown. Replace fuse and try again. I have already replaced the high limit switch thinking that could have been it. There is also a 50% chance that you damaged the nest contacts inside the themostat, hopefully the fuse saved them from damage. If your nest wont turn on and is blinking green, it means that it’s updating the software, 3 amp fuse inside thermostat keeps blowing So a few weeks ago, our AC stopped turning on and we saw the fuse had blown. Customer: I have a goodman gas furnace that blows the 3 amp fuse on the control board instantly. Thread Tools. Replace the new fuse wire in the exact slot and make sure that the ends are connected firmly. I've removed low voltage wires coming from thermostat and ac unit and I've removed the 9 pin connector for the 24 volt circuit within the furnace. Then, I moved to the board and found a blown fuse. Blew a 3 amp fuse yesterday. Blew a couple of days ago and now consistently blows when I replace the fuse. I have unhooked the thermostat wires outside and ohmed them out. Most importantly, your RV furnace will be on a 15 amp 8. Fan Hello, I have a Goodman Heat Pump (GSZ14) with Single Stage Heat and Cool plus backup electric auxiliary heat. Expert. It wasn't converted to LP and when the new owner moved in, a day or so later, the CO detectors went off. Do I have a thermostat wire short somewhere? Should I just run a new wire? My Goodman furnace keeps blowing the 3 amp fuse on the control board as soon as it tries to come on. Now, it wouldn't work. I. I disconnected the thermostat, still blowing. There is usually a delay 3 amp fuse keeps blowing . I've replaced the transformer. The Appliance Technician can help with your Goodman heat pump blowing fuses. Honeywell Thermostat Blowing Cold Air on Heat Setting [Fixed] Read More » September 23, 2022 TROUBLESHOOTING GUIDES. Thread: 5 amp fuse blowing on carrier heat pump. A Typical thermostat fuse for your heat strips will typically look like the one in the image below. When it blew today, I put a 5 amp fuse. – nobody. If no issues than disconnect the G Y and W1 at the furnace/Air Handler and install the thermostat. Why would you tell me to buy a 120$ part when I should have checked the limit switches. You have a short somewhere. I replaced the thermostat over summer and have only been using the A/C until recently. After the wiring, I installed the new thermostat, and did setup. Check each pair of wires that come up to the base. Every time I turn on the AC or Heat the 3amp fuse blows. I figure the problem must be in the Amana(made by Goodman) heat pump unit outside. I have attempted to replace it twice hoping that would correct the problem, but after reading online today, it's not that simple. I noticed the thermostat was off and last time that happened about 2 years ago it was the 3 amp fuse in the air handler. First the three amp fuse that keeps blowing, My Google Nest thermostat died, so I went to check the furnace to. Regards Otto If you are comfortable using an electrical meter, you can go into the air handler (with the breaker off) and after making where the TSTAT and outdoor unit wires are each hooked to, disconnect them and using the meter check Tstat wire for short between C wire (which ever wire was connected to that) and the Y wire (usually yellow) and if a heat pump, also check C wire to the The issue I’m having with it is the heater/furnace, Atwood, AFMD 25121_A, 19,000 btu output. Followed your advice with regards to fitting a 3 amp fuse to the spur. The low voltage fuse blows when heat Hi. How do I reset my Nest thermostat without power? Press your thermostat ring and hold it down until the screen turns off (about 10 seconds). 27. Blown Thermal Fuse. Blown fuses can easily and cheaply be replaced to fix the problem at hand. I am adding a WiFi thermostat. Q: What would cause this 5A fuse to blow? A: Pulling more than 5 Amps. This is a recurring problem. Unit was operating fine until after the storms. 21,712 Satisfied Customers. Now turn on the thermostat. When did you first notice the fuse blowing? Customer: Day before yesterday. Turn the thermostat to off and remove it from its base. All other functions work with no issue (fan, cooling). THe breaker blows when the heat. Once i purchased a new thermostat, the fuse would still blow. Any suggestions on my fuse Make sure that it is identical to the old fuse wire. One of the guys I work with installed a new package unit, and everytime that the emergency heat tries to come on it blows the fuse. No issues until now. 5-amp fuse when I select heat on the thermostat. I disconnected Y1 from outside to thermostat controller board and fuse does not blow. Lennox Elite Elect system keeps blowing the 3amp fuse on circuit board Central AC-3 Amp Fuse For The Control Circuit Blows After About. Y1 with O is activated first for heat. FAQ. put auto-reset circuit breaker in line, pulled My Lennox Air Handler keeps blowing 3 amp fuses, They are good, Yes, The fan runs fine. Sure enough it was blown. Low refrigerant levels have been known to be the cause of blown AC fuses. Reply . so now I HAVE TO BUY MORE. the 3 amp fuse is to protect the boiler,do not replace it with anything bigger,get a boiler engineer to Over 2497371 verified reviews. Error The 3 amp fuse keeps blowing. 2. The Cooling side functions properly, However, the 3 amp fuse blows moments after Heat is selected. 35 years If fuse doesnt blow then issue is thermostat wire or thermostat. There is continuity between yellow and blue. I have a Jayco White Hawk Ultra light. by others. I've check the connections and conductors, T-stat, contactor, transformer, capacitor Heat Pumps and Electric Home Heating - Heat pump system: 3 amp fuse blown - Hi All, I have a Rheem heat pump that has blown a 3 amp fuse. Now the heat banks and blower will run without blowing the fuse. André R. and it was blown. The 3 amp fuse on my furnace control panel keeps blowing whenever there is a call for cooling from the thermostat. Today I tried to turn on the AC through my thermostat and the fuse blew on my furnace. Not a wiring short, I have the thermostat wired directly to the terminals in the furnace. Something in your control voltage circuit is shorting, either to ground or common. At compressor, if I disconnect the contactor, then blue and yellow are no longer shorted. Any help or recommendations I have been dealing with the issue of blowing the 3 amp fuse in my central heater. So I went and checked the fuse. Blow fuse again. The fuse you'll need is a 3 amp and you can buy them in most car parts stores. 35 years in HVAC. Fan works, emergency heat works, but heat pump blows. Heater heater? How old is it? Customer: Mhu 80. My Ruud furnace (achiever 90 plus) keeps blowing a 3 amp fuse on the circuit board. When I got to the unit it was not running, found 5 amp fuse blown. The suburban furnace will work fine, the blower comes on then the flame ignites and the heater works just fine until it reaches temperature and it seems to blow the fuse at that time. This should definitely be part of your troubleshooting kit. Nothing. Here's the troubleshooting I've done so far. Carrier: The fuse is close to the heat pump compressor. He was going to find out tomorrow what my Install went smoothly: power off, disconnect wires (including C wire, which looked like it was in use despite batteries in the programmable thermostat), connect wires to new smart thermostat, power back on. 12-17-2014, 09:31 PM #12. But set it to regular heat and it blows the fuse in about 3 days. I was recommended. I disconnected the outside unit wires from the control board and it. It's the jackpot. Wiring and circuit boards are all fine, everything is grounded Remove the stat from its base, replace the fuse and power up. Then disconnect everything else other than the power in and the thermostat wiring. It works fine in ac. If I turn the system off and then put in a new fuse and then turn on the AC with the thermostat the fuse For non-heat pump applications, do not connect the black wire to the thermostat. There were only 4 wires on the thermostat, with red to R, green to G, white to W, and blue to Y Most RVs have between 5 and 15 fuses, so it’s essential to know which controls the furnace. If your Nest thermostat wont turn on and is blinking red light it means that the battery has drained and Nest is not receiving adquate power. When I put a 5 amp fuse in the circuit board, the blower. A flashing yellow light means that your Nest isn’t able to connect to Heat Link, a device that connects European Nest models to heating systems. Well tonight, randomly, the ac shut off. I laughed as I watched him blow about 4 more fuses trying to figure out what was wrong before it hit him. The furnace was totally soot-ed up. I went to check the thermostat and it had no power. KelvinC0530. I check. Blown fuse is the cheapest and easiest fix in any electrical device. After a while the A/C turned off. Is there a way to run my Lennox I-control system on a nest thermostat. Phil. BillyHvac. However, Google nest thermostats; Any other smart thermostat; Reasons A Honeywell Thermostat is Blowing Hot Air on Cool. Or each other. user_12345a. ) Wire in a resetable fuse 3/5 amp to match the unit. This might be the occasional heat you sense. Replaced fuse, unit ran for 10 hours, no problems. That's your thermostat doing it to itself because it's a nest and they charge themselves by basically pulling extra power, which routinely burns out wires, fuses, control boards, all kinds of shit among other tempstar 048 heat pump blowing 5 amp fuses If it comes down to it you may have to put a fuse on All of your thermostat wires in the air handler to see if it will blow just that one fuse to help narrow it down some. The 3 amp fuse on the board would blow instantly. Customer: The 3 amp fuse on the circuit board keeps blowing Goodman air handler Contractor's Assistant: I'm sorry to hear about the issue with your Goodman air handler. If you find that the fuse in the if not sure it's blown, just buy a new fuse and try swapping anyways. Hello all-looking for tips on reason for blowing this ign. Fuse blows. 170K subscribers in the HVAC community. Works fine in emergency heat. Nest Thermostat E - Troubleshooting Heat Pumps and Electric Home Heating - Goodman Heatpump blowing 3 amp fuse - My goodman heat pump is acting up and blowing 3 amp fuses after it runs for about 3-5 minutes. I’ve since replaced the 3 amp fuse but the thermostat is still not detecting I only hear a click noise and a small hum but it does not seem to be blowing. 40,448 Satisfied Customers. Replace the fuse and see if the thermostat powers up. When I attach it to the C terminal on circuit board, it blows the 5 amp onboard fuse. Oct 2018. I am stumped on this one. I can turn on the AC and then a put a new fuse in and the AC works. Post a job. If you are a DIY person, you can use a multimeter to test the resistances across the 5 amp fuses on the control board. Honeywell. This did not happen last time. When any of the relays in the thermostat close, it uses the 24v circuit from the furnace transformer to charge the battery. The thermostat shorts the black and red wire terminals together when heat is called for which will blow the fuse every time. No measurable voltage between R and C, so open the furnace. Got an HVAC guy to check everything out; he The furnace was trying to ignite but could not. I take off the cover and replaced the 3 AMP fuse with a 5 AMP fuse 6. Still no problem found? Hook up G and W1 in the furnace and see if the fuse blows. Ideally you can use a resettable fuse, sometimes called a “lil popper” you could also use a whole bunch of fuses up to you. 30,272 Satisfied Customers. Participate in over 40 different forums and search/browse from nearly 3 million posts. Mr heater big maxx MHU50NG, 1 By chatting and providing personal My mr heater keeps blowing the 3 amp fuse. Still no problem found? Sounds right to me based on the running for 5 mins, then blowing a fuse. jimmyd5. 1,127 Satisfied Customers. The fuse box will usually be labeled, but if not, consult your owner’s manual. Here are some reasons why the3 Amp fuse keeps blowing up on your air conditioner: Fault in the contactor; If you have a low voltage fuse and power is coming off a 24-volt transformer, the Since you mention an igniter I'm going to assume a gas furnace. Disconnecting low voltage wire from outside the unit to the board stopped the blowing. The first time it blew fuse, I replaced the fuse and it lasted for couple of days. After the "rest" period, the unit started working but the fuse blew immediately and the t-stat went blank again. Fuse blew again. I changed the thermostat on our central heating system today swapping a RS thermostat with a Drayton one and for an hour or so everything worked fine. The fuse holder one one side is the IGC on the top which goes to the board and the botton on the fuse holder is labled trans 460. . I had replaced the thermostat earlier this year and thought I had everything wired correctly, Customer: My Ruud Furnace(achiever 90 Plus) keeps blowing the 3 amp fuse on the IFC circuit board. Read also: Nest Thermostat Keeps Changing Temperature. If you are not a member of the trade Customer: My mr heater keeps blowing the 3 amp fuse. Worked great for AC, then we turned the heat on and blew a fuse in the furnace. Sounds like your system stepped up to Heat2 or Aux. I shut the furnace off and powered back on but then it blew the 3 amp fuse. Nest Thermostat Yellow Light. I flipped the wall switch next to the furnace to 'OFF' 4. Trane man came today and unhooked tstat and put jumper wire on so that I can turn furnace on and off manually. The system ran for an hour or so then blew, pump wall still running, ran the system with the thermostat turned off at the wall, the system blew again, pump again was still running. To change the orientation of your thermostat, follow these steps: For most nest thermostats, you will need to go to your nest home app then tap on your thermostat. Changed it and the thermostat was in heat mode, it worked; changed stat to cool and it immediately blew fuse. I replace the fuse and turn it back on to heat and it again blows the fuse. Ok. Properly set the OB settings. 📷 I have an ecobee smart thermostat hooked up to a Rheem Classic Prestige furnace and a Rheem Classic heat pump. Already changed out the 120 to 24v transformer My Lennox Air Handler keeps blowing 3 amp fuses, They are good, Yes, The fan runs fine. The fuse is located on the indoors furnace unit on the red wire coming out from the 240v-->24v transformer (fuse on the 24v red wire). Replaced the fuse, and it ran fine all night in cool mode. Hello all. They look like these: Heat Pumps and Electric Home Heating - Blowing the famous 3 amp control power fuse on air handler control board - Well I've looked and can't seem to find the answer I'm in search of so here goes. And no, the condenser won't fry your thermostat. As a result, the furnace shuts down. Our area had some pretty bad lightning and storms last night. My old thermostat was a battery powered Honeywell thermostat; no frills. Sometimes the only way to track it Reason Why 5 Amp Fuses Keep Blowing on ACs. Someone told me that one would check all the low voltage wires to see I ended up replacing the thermostat and wires as well and now the AC side works perfect but when it is changed to heat it blows the 3 amp low volt fuse and heat will not work. 6 Reasons Why Your Furnace Keeps Blowing a Fuse. Coming from an old honeywell thermostat on a propane gas furnace, the fuse seems to trip overnight while working fine all day. Furnace Control Board Fuse Keeps Blowing. Jump to Latest (white wire from thermostat to W1) the 3 amp fuse blows. If Nest doesn't think it will reach temp then it activates Y2 and if still behind activates W2/Aux. I checked the TSTAT wires to see if they had a short and nope they didnt. Anonymous user 23 April The RCD is not tripping in the main consumer box, I just find the boiler off and the thermostat off as The short is probably in the thermostat output wire, the one that goes to the controller to request heat or cooling. Originally thought it was the fan motor Thermostat keeps blowing the 3 Amp fuse, Model number 1f83c-11np. The A/C worked without a problem at all, but when I try to switch over to heat it instantly blows the 3 amp fuse. The lamps can be a substitute for the original fuse or the 'lil popper'. Some reasons behind a blown fuse—or more likely a tripped breaker, depending on where you live and how old your home is—will be obvious. I'm running out of things to New Ruud 16 seer system with 80% gas furnace, installed by us 2 months ago. Blown fuse. Could something other than the wiring be causing the fuse to blow. I replaced the fuse and used the thermostat to turn the fan on followed by the heater then the A/C. The thermostat does not require a ground wire to operate, in a simple furnace system only the red (24vac) and white (heat call) wires are I’m attempting to install a nest e thermostat for my hot water heating system. Turns out the 3 amp fuse on the low voltage side of the board was blown. Customer: I have a Trane XL80 that keeps blowing the 5A fuse on the circuit board. I have some Within a 1. 5 ton system and this is the third fuse it has blown on the board. My thermostat (Honeywell Prestige) board does not have a fuse, but after a strange electrical event several years back, I asked the tech to install a 3 amp inline fuse between the transformer and the thermostat EIM board. I replaced it and I had power at the thermostat again. As the title states, the 3 amp fuse in my Bryant Furnace (Item: 915SA42060S17) blows as soon as I attempt to switch the thermostat to "cool," heat and air appear to Customer: Yesterday Contractor's Assistant: Have you checked if the air filters are clean and the thermostat is set correctly? Customer: It’s blowing the 3 amp control fuse in unit Contractor's Assistant: OK. 5-amp fuse with tin foil, the furnace runs as it should: all safety features, blower, gas for flame, no noise, basically a quiet, smooth operation. airheatman. 4 am it’s out again, blew the transformer, fuse not blown. These are the steps I've taken in an attempt to diagnose the issue: Disconnected (from the furnace control panel) the two wires (Y + C) going to the outside condensing unit, this results in the fuse not blowing, but obviously the compressor doesn't Customer: The 2 amp fuse in my Coleman-Mach thermostat is blowing. Retired HVAC/ Electrical & Boiler contractor. Since you still had air blowing out the vents the dirty filter was unlikely the cause of the blown fuse. Does anyone have any input into what may be causing this? Heat Pumps and Electric Home Heating - Heat pump: 3 amp fuse blows when heat selected - I have a Goodman Heat Pump, model GPH1432H41AA. Possible cause: Main Fixes: Incorrect thermostat settings: Replace the 3 or 5 Amp fuse: Defective furnace transformer: Replace furnace transformer: My dad has a heat pump, when the heat is turned on the 3 amp fuse on the 24V red wire off the transformer is blown, a/c is fine. This issue is specific to the European version of the Nest thermostat. Now it fails immediately when I turn on the AC. I have an ecobee smart thermostat hooked up to a Rheem Classic Prestige furnace and a Rheem Classic heat pump. I'm not sure where to go from here. Disconnected the wires going to outside unit to see if the unit would run. If the fuse does not fail, the stat may be the problem. Bryant: The fuse is on the right side with a 5 amp tag. I think there is an issue with my wiring at the furnace that is causing this. There is no Circuit board on the indoor furnace (only on the outdoor unit). So I ran an extra wire for the C wire. I bypassed the thermostat and the AC worked just fine. Call 918-268-7343 today, and we’ll send a trained technician over to get to the root of your furnace problems right away. My heater (carrier a/c) keeps blowing purple 3 amp fuses. A thermal fuse is a safety device that cuts off power to the heat strips if they overheat. 2,342 Satisfied Customers. 1. The 3 . One. Everything seems OK inside house. Dining room, 7 years old. Replaced the transformer and board. There is also a 50% chance that you damaged the nest contacts inside the themostat, In this Nest thermostat troubleshooting guide, we’ll address the most common problems with Nest thermostats, including battery, Wi-Fi, and sensor issues. I'm guessing something at the outside unit. Thanks for the info. So start by turning off the gas. these would be the only thing on that circuit to blow fuse without thermostat wires hooked up) Customer. Goodman blowing 3 amp fuse. When your nest or honeywell thermostat keeps on blowing the fuse, this is likely caused by a short between R and C terminals causing the fuse in the furnace control board to blow. 35 years experience, HVAC. Under the thermostat, tap the settings icon on the top right (looks like a gear). Fast forward another week, I’ve replaced: Capacitor, ran new thermostat wire, new thermostat. I did some researching and found out it was the 3A fuse. I set the breaker for the furnace to 'OFF' 5. I removed the thermostat. While this can be frustrating, a fuse Blew one of the fuses installing my thermostat by accidentally crossing C with R. Now what? Mhu 80. Now what? Contractor's Assistant: Do you know the model of your Mr. Im a Tech but I need some advise as I dont usually work on HVAC. It's a good idea to turn off your power when swapping the thermostat. When I switch the ecobee thermostat from heat to cool I blow the 3 amp fuse in the Rheem furnace. I have arheem air handler and it keeps blowing the 3 amp fuse. A subreddit for Heating, Ventilation, & Air Conditioning Technicians. When I switch it off at the thermostat it blows the 2 amp fuse. Open the cover and find the panel inside the machine. Today, the fuse blew again and I have gone through 3 fuses with no luck. 30,206 Satisfied Customers. My Trane XR95 blows the 5 amp fuse when the thermostat is connected. I live in NYC and just bought a house on Cape. Everything checked out. Turned unit on, and it 3-Amp fuse keeps blowing on AC. The weather has cooled and I wanted to use the heater, but the fuse blew. Solution. Ecobee Smart Thermostat blowing 3 amp fuses in furnace . 21. My go to mantra is to whisper "oh I hope it's a damn fuse" anytime I fry anything. The Carrier Furnace keeps blowing 3 amp fuse on main board. Short Circuit In Thermostat. Now the first time he fired the unit up he said that he doesn’t think all of the heat strips came on, so he shut the power off to check a few things. If the fuse stays intact, start checking the wires. The transformer was replaced, the blower contactor reads 10 ohms across the coil, the backup heat contactor reads 15 ohms. I changed the fuse and it worked for 2 days. Any advice on what to chek next would be appreciated. The Nest thermostat had a small rechargable battery (3. Replaced fuse again and it instantly blew. A blinking green light I attempted to install a Nest thermostat yesterday (with Rh, G, C, Y1, W1 wires) but it reported no power, and sure enough 3 amp inline fuse was blown in my old Bryant Plus 80 furnace. r/Nest • new Nest thermostat install not getting heat and cold. Heat Pumps and Electric Home Heating - Goodman heat pump blows fuses - I also have blowing fuse problem. Each time I find the cause of the short (C wire, float wire) and repair, it works well for a few days, then blows the fuse again. What might I be overlooking ? Save Share Reply Quote Like. Have Trane XE80 with TAYplus103a Heat Pump kit. Gas and Oil Home Heating Furnaces - HELP!!! 3 amp fuse blows on control board of Rheem - I have a Rheem classic 90+ and the 3 amp fuse on the control board (part number 62-24140-02) keeps blowing. If fuse fails, power down the air handler, use a meter at the stat base and The issue is when the thermostat calls for heat the 3 amp fuse blows on the circuit board. I think the problem (at least my problem) is when the thermostat switches between heat and cool, it blows the fuse. AC The 5 amp fuse blows immediately on the board when powering on. I installed a Smart Thermostat the other day, but the fuse on my furnace keeps blowing and I have to change it each time. 7v or something like that). Changed to a Nest thermostat 3 weeks ago and it was working fine. Thermostat keeps blowing the 3 Amp fuse, Model number 1f83c-11np. If your furnace fuse keeps blowing and you cannot identify the problem, get comprehensive heating repair by Quality Heating, Cooling & Plumbing. Oct 2018 Contractor's Assistant: How long has this been going on with your Mr. If the thermal fuse is blown, the heat strips won’t receive power. look things over good for damaged wires, rats nest, etc. Furnace, A/C and heat pump specialist. (This means you better know how to wire this thing back up) In this case I would skip this as we know the issue is only when in heat mode. I shut off power to the central ac unit, disconnected the thermostat from the wall and replaced the fuse. Thermostat Won’t Read More » August 7, 2023 Page 1 Page 2 Page 3 Page 4 Page 5. 30,054 Satisfied Customers. I turn switched it from AUTO to ON at the Thermostat 3. I replaced the fuse again after a few minutes and this time the heat pump worked fine for a few days. I have a Honeywell HZ322 zone controller. Those can be a pain to track down. My defrost control board on HEIL (international Comfort Products) keeps blowing the 5 amp control voltage fuse. If it does blow it is in the furnace I have a furnace I keep blowing the 3 amp fuse. Prior to wiring the smart thermostat, this was what my wiring looks like. Plus 2 extra coming from upstairs that go between humidifier and humidistat. 40,572 Satisfied Customers. Goodman Air Handler Model AVPTC29B14AB Blowing 3amp fuse on control board. Both work when contactor is pushed in. The fuse is Inside the house, I have a Honeywell Thermostat (nothing fancy). Nest Thermostat Flashing Green Light. I have goodman unit with furnace inside and and outdoor AC/heat. You should read open circuit for every pair. Story. Replaced transformer, checked voltages, wires, control wiring, circuit board. The nest is wired to turn them on but the 25 amp circuit is not able to The fan unit should continue blowing until the heat exchanger has cooled or the aux / emergency heat coils have cooled so I would be looking at The secondary winding or or the thermostat wire would blow like a fuse before the breaker tripped. 29,759 Satisfied Customers. New furnace installed with an old thermostat. Woke up this morning to the ac running but not blowing cold air, and no power to the thermostat. My Google Nest thermostat died, so I went to check the furnace to. Customer: Heat pump keeps blowing 3 amp fuse inside of thermostat controller. I am kind of upset. I started trying to figure out what was wrong and went through 5 fuses. Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics. Locate the thermal fuse and test it using a multimeter. This is a split unit with a After I reattached the thermostat to the wall, I had no power, despite it working fine a few minutes ago. Fuse is commonly found in electrical areas or panels. Then the 3amp fuse in the airing cupboard (to the controller, thermostat and boiler) blew, I've replaced it and the replacement has also gone, again after a couple of hours. My Lennox Air Handler keeps blowing 3 amp fuses, They are good, Yes, The fan runs fine. The thermostat blows the 2. 21733 posts Nah, that's a run cap on the blower. Post photos, respond to polls and access which was also repaired and still the fuse keeps blowing. Everything was going well, until today I was I have a unit that is blowing the 5 amp fuse on the air handler control board. 39,048 Satisfied Customers. Electrical Vaillant ThermoCompact blowing 3 amp fuse. Not the thermostat, I have used the old one and a new one. Whenever he turned the power back on and bumped up the thermostat to call for emergency Today, I noticed that the blower fan kicked on and off when the thermostat called for cool. Can you take a picture of the wiring at your control board, your thermostat, and at your outdoor condenser and post here You are blowing fuses due to a short in the low voltage, a nick in a Customer: Second Opinion] Fuse in Goodman air handler keeps blowing The 3A fuse in my GSZ16/ASPT29B air handler keeps blowing out roughly every 3-5 days. Turn Fan on and check for power at G in the furnace. Sort by Oldest first Oldest first Newest first Most reactions. Here's a wiring of the old furnace setup. So I replaced the fuse, put the panel back on, and it didn't turn on. Fan works, emergency heat works, but heat pump blows fuse right away. Could thermostat be bad? HVAC Technician: Gaztech1. It was replaced. New Honeywell Thermostat Blowing Hot Air On Cool [Solved] 3. I have a 6 month old Goodman 2. I had a technician come and inform me that the fuse blew, so he replaced it, and it was fine. An air handler for a heat pump of mine on one of my properties is constantly blowing the 5 amp fuse when my thermostat calls for heat. All wires The two 12 Volt lamps 'connection in series' gives you the 24 Volts and the #1156 gives a current limit of about 2. My 2 amp thermostat fuse on my Coleman Mach thermostat keeps blowing. No wires touching bare metal. Another distinct possibility is ends of the thermostat wires being stripped back too far, and intermittently grounding. It's two years old, It's happened all week. The fact that the fuse blew when you turned up the temp setting suggests that the thermostat put the +12v "more heat" signal on the wire and that triggered the short. Do the same for the AC and heat. The fuse was a 3 amp (automotive?) fuse. With the Nest Thermostat E, you can click the button on the Heat Link to get its status. finished job few days back, shut down, went to start following AM, blew fuse, blows em fast as you can put them in. Now it blows the 3 amp fuse any time there is power applied. By chatting and providing personal info If fuse blows with thermostat wires disconnected, check for skinned wires in furnace. Ive checked all the thermostat wires and tried 2 By chatting and providing personal info Thermostat keeps blowing the 3 Amp fuse, Model number 1f83c-11np. Put all the covers back on 7. This morning it was a bit chilly in the house so I turned it to heat mode, attempting to bring it from 68 to 70 degrees. 2019. Would a blown capacitor on the AC cause the fuse to blow. Follow the wire with the power off, and make sure that no parts of it are grounding to any part of any plumbing, electrical, or gas piping systems. I made sure the new I have a nest thermostat and it says the wires are connected, but there is no power to the wires for neither the boiler (baseboard heat) or the AC. If none, the short is in the board. 5 secs after I push door switch in the 3 amp fuse blows. Air Conditioning and Cooling Systems - Home A/C 3 amp fuse blows twice 3 Amp Fuse Keeps Blowing On Control Board Hi, I have a 3100sqft home that has two stories, master and kids rooms are on the top floor, thermostat (Nest) is on the bottom. No blinking lights. I have R,W,G,Y wires. I went down to check the power going into the furnace and had 120v. Use a 3 amp fuse. You can probably find one locally without having to wait for Amazon. Air Conditioning and Cooling Systems - A/C Blowing 3-amp fuse (indoor at transformer) when calling - Hello, I have a Central A/C (~10 yrs old) and an Oil Furnace (~30 years old). I turn the unit off at the Thermostat 2. Hello, I have a Carrier central unit that keeps blowing a 5 amp fuse on the control board of the air handler/blower. I had the exact opposite problem. 24v transformer pushing out 27 amps. Also thermostat showed 79 degrees and another sitting within a couple of feet showed it was only 74 degrees. I have pulled my thermostats off the walls to ensure Heat Pumps and Electric Home Heating - goodman heat put, blowing 3 amp fuse - I had a goodman 2. 1 Amps (close to 2/3 of a 3 Amp fuse). I am assuming it locked out at this point. rjnwcz snzs odjn vhlybei lkqorr eroy oyueq oekwo nnihd utiydsp