After a while the A/C turned off. Heating & Air Conditioning Expert : Jan 10, 2010, 03:15 PM Usually the fuse blowing is due to a short circuit in the low voltage wiring or a defective component. Why You Might Need Goodman Furnace Troubleshooting. 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. 365 day right part guaranteed return policy. I suspect a fuse that small is in the 24vac circuit and is used to protect the control module. If you haven’t been diligent about maintaining your furnace, all its parts will have been silently and steadily collecting debris and dust. 95. The whole system shuts off after a night of use. Common Reasons Your AC Fuses Keep Blowing. A faulty transformer or a malfunctioning thermostat wire can all be common culprits for fuses that continue to blow. $9.95 $ 9. I checked, and my Ecobee was off. Last summer I had replaced the fan motor, compositor on the condenser. Already changed out the 120 to 24v transformer. Get it as soon as Thu, Dec 24. I have a two year old Goodman Model GPC1242H41CA package unit that has heat strips, I had a short that eneded up causing me to replace the transformer and the control board. 95. Get it as soon as Fri, Jan 15. Conext Link ATC3-25 ATC Fuse 25 Pack (3 Amp) 4.7 out of 5 stars 69. Discussion Starter • #1 • Nov 16, 2019. furnace model# 58GFA120-LC. After another days use the same thing has happened. Well tonight, randomly, the ac shut off. But for those who’ve recently encountered one common issue – a furnace blowing its fuse – before scheduling that tune-up, it may be due to one or more of the following reasons: 1. Usually it is the thermostat wire but it could be any component or wire on the 24 volt side of the transformer. AC: Goodman CLT36-1B (approx. After reading some other posts, I … Dirt. … 100 % of customers recommended. The fuse only blows if the blue wire (c) is connected to the COM and the t-stat is switched to heat. Noticed the 3A Fuse was blown...replaced it and taped down the switch thats on the front of the unit. 4.8 out of 5 stars overall. Only 8 left in stock - order soon. (Goodman ARUF48D14AC air handler and VSZ140421AA heat pump) On the chance it was just a bad fuse, I replaced it and it blew again after approximately 3 mins of air handler and condenser operation. All are about 2-3 years old. So I replaced the whole run from thermo down to furnace. Fast, same day shipping. Furnace Control Board: HK42FZ013. So far, I've used a multimeter to test the 24V transformer, AC unit capacitor and conductor; they are all good. I have a blown fuse on the control board. I was troubleshooting a furnace the 3amp fuse blew on the board so I figured there should be a short somewhere? When the electrician on site called me earlier he said he was getting 123 to the outlet. I did some researching and found out it was the 3A fuse. Gas Furnace Thermostat Wiring Diagram, I saw on wiring diagram a 3 amp fuse on secondary side of 120v to 24 volt transformer can anyone tell me where it is Now the fuse blows whenever a/c or heat is selected (and temp adjusted). Its a 1994 Sierra 32' TT with the original Suburban SF series furnace. Help diagnosing AC! Discussion Starter • #1 • Jan 7, 2011. They can come loose over time due to the natural vibrations of the unit, so make sure to check the connections. Solution: Use a Volt Ohm meter. How to Replace a Blown Fuse on a Furnace. If the refrigerant level is low, your AC system has to work harder. Overall Ratings. They make resettable fuses in 3 and 5 amps called poppers. Customer Reviews. Heat worked fine last winter and never used the unit at all from about June to October and then when I tried turning it on in October got nothing. When the furnace went out, I checked the circuit board and noticed I was getting code #24; "secondary voltage fuse is open - check for - short circuit in secoundary voltage wiring (24 VAC) wiring". Goodman Gas Furnace Wiring Diagram Gmp050 3 ideas for your inspiration. The heater worked fine during the winter. We have a 1993 Goodman 92% gas furnace (no central air). I took off all the wires of the dummy board and jumped out r & W furnace turned on fine but as soon as I put on the wires for the condensor on Y & C fuse blew again I checked the 2wire running … Get it as soon as Thu, Dec 24. 3. There are a number of reasons why your air conditioning system keeps blowing a fuse. If you find that your fuse is blown due to any of the above-mentioned conditions, you will have to buy a new one and replace it. 5 (8) 4 (2) 3 (0) 2 (0) 1 (0) Verified Purchase (0) Sort By: HomeDepotCustomer. 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