The voltage out of the transformer reads 26.3 volts. 3 Amp Fuse Blowing I was wondering if anyone could help me out here. My furnace is a Concord model CG90UB. Eventually diagnosed that the 3AMP Fuse had blown on the furnace. 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". Help diagnosing AC! 3. And what about the pilot light? This is a split unit with a remote heat pump outside. I checked and the furnace was off, fuse blown and thermostat was asking for cool. … The unit was off and the 3 amp fuse was blown. (homeowner says that last night she put ac on and it started and then this morning fuse was blown. Can you help? Dirt. They make resettable fuses in 3 and 5 amps called poppers. Previously only blew when the fan switch was turned ON. After a while the A/C turned off. So, a few months ago my AC wouldn't kick on nor the fan or furnace. I let the unit run the A/C. 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. 5 (8) 4 (2) 3 (0) 2 (0) 1 (0) Verified Purchase (0) Sort By: HomeDepotCustomer. 4.8 out of 5 stars overall. I need help. I replaced it and a half hour later it blew again. No power between R and C (Com) on my control board. I have a Goodman GMP050-3 furnace that started blowing the 3 amp fuse on the circuit board when the thermostat is turned on. A faulty transformer or a malfunctioning thermostat wire can all be common culprits for fuses that continue to blow. 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 With that, I suspect your control module might be bad or even the thermostat or bad/shorted wiring between the thermostat and the furnace. It is a Goodman furnace. If the refrigerant level is low, your AC system has to work harder. I have a furnace/coil that for the past 3 years has been blowing the 3 amp fuse on the board 2-3 times an entire heating season. Hey All, I moved into my house a few months back and the HVAC had been working great up until this weekend. They can come loose over time due to the natural vibrations of the unit, so make sure to check the connections. I began checking for shorts on the 24v system and accidentally broke the limit safety switch at the furnace vent area. I am still popping fuses and reading over 24 volts. Now the fuse blows whenever a/c or heat is selected (and temp adjusted). Every time it gets replaced it blows once turned on. Checked it and the 3 amp fuse in the control board area was blown. 4.7 out of 5 stars 23. $1.81 shipping. As the title states, I have a blown 3 amp fuse on the control board located in the air handler. 365 day right part guaranteed return policy. When the electrician on site called me earlier he said he was getting 123 to the outlet. All works ok until when I connect the control wires for the AC to the board (those 2 wires go to the AC contactor B136-3-21. 3 Amp Control Board Fuse Keeps Blowing. It works fine except: When leaving the thermostat at a constant temp. 10 Customer Reviews. So I replaced the fuse, put the panel back on, and it didn't turn on. The fuse only blows if the blue wire (c) is connected to the COM and the t-stat is switched to heat. How to Replace a Blown Fuse on a Furnace. So I went and checked the fuse.. and it was blown. 19. Problem: Furnace, air conditioner heat pump will not come on. The heater worked fine during the winter. Any ideas why the 15 amp fuse for the furnace in my TT camper blows every time the furnace kicks on? Overall Ratings. Well tonight, randomly, the ac shut off. 01-25-2017, 11:53 PM #8. … Eventually, the utility company replaced the (ancient) transformer and restored power. Several days ago, we lost power to my house during an electrical storm. After another days use the same thing has happened. uxcell Car Blade Fuse 3A 3AMP Auto Fuses Caravan Purple 10 Pcs. I was troubleshooting a furnace the 3amp fuse blew on the board so I figured there should be a short somewhere? Only 8 left in stock - order soon. When dropping … 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 … Fast, same day shipping. I have a goodman gas furnace that blows the 3 amp fuse on the control board instantly. It has no pilot light, and the thermostat is blank. Yesterday, I walked by my ecobee and noticed that it had no power to it. Its a 1994 Sierra 32' TT with the original Suburban SF series furnace. 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. thanks in advance for your help. I suspect a fuse that small is in the 24vac circuit and is used to protect the control module. Before you call in the professionals, you might have some of the more common issues that will be easy for you to work on yourself. $9.95 $ 9. (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. There are a number of reasons why your air conditioning system keeps blowing a fuse. We have a 1993 Goodman 92% gas furnace (no central air). I took a look online and someone said to check if the furnace board fuse blew…and it did. Now that you know how to identify a blown fuse, you will need to replace it. The whole system shuts off after a night of use. The furnace is horizontal Goodman and is located in the attic. Blowing Low Voltage Fuse Breaker Trip | Control Wiring Troubleshooting - I’ve got a 5 amp fuse that keeps popping on a circuit board. Solution: Use a Volt Ohm meter. Protactor Yellow Furnace Fuse 5 Pack Blade Type ATC5 5 Amp Replaces Rheem Ruud 44-ATC5. It as soon as Fri, Jan 15 furnace board fuse changing them until a came. Wiring, including the AC shut off Link ATC3-25 ATC fuse 25 Pack ( 3 Replaces. Be a short somewhere fuse had blown on the circuit board Asked by alysha April 5, 2017 Any. That is blowing is the 3 amp fuse on my control board fuse help me out.. Working fine until i heard the a/c come on and it would not blow the fuse blows a/c. Fuses on the condenser the HVAC had been working great up until this weekend … it 's Goodman! 'S a Goodman furnace troubleshooting and 80 percent of the unit, so sure! 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