252 satisfied customers. So I replaced the fuse, put the panel back on, and it didn't turn on. I found that the transformer in the air handler is blown along with the 3amp fuse. I have read that this is often caused by the pump or fan. Heat works fine. Solved, see below. If the transformer was gone you wouldn't be blowing fuses. However, one of the most common causes of heat pump system failure is tripped circuit breakers or blown fuses. It went directly to backup system. Luckily, the solution is simple. I have a 4 Ton Performance Series 2 Stage Heat Pump (25HPA648A003) and a FV4CNF005T00 - 4 Ton Bryant Air Handler. You need to find the root cause of the blown fuse on the furnace circuit board before you cause damage to the unit. So I went and checked the fuse.. and it was blown. The 3 amp fuse on the board would blow instantly. So, a few months ago my AC wouldn't kick on nor the fan or furnace. Go. I have a Bryant FB4 Heat Pump - the 5amp fuse on the control board keeps blowing at night. Re: 3 amp fuse keeps blowing The 3amp fuse protects the transformer and the circuit board. Couple of days ago the system failed to run, in either heating or cooling modes, althought it ran fine a few days earlier in ac mode this year. Any ideas? The thermostat said backup was on. I have a Goodman split heat pump system, compressor CPLT24-1 and air handler ARUF032-00A-1C. Website operating Fan and heater work fine. [ 9 Answers ] My a/c keeps blowing the 3 amp fuse on my furnace. 3 amp fuse blows as soon as A/C is turned on. With a good fuse in the AC work fine and you can switch the fan from Auto to Fan on with no problem. 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. If you fix the fuse once and it immediately blows again, you have a much larger problem on your hands that seriously needs to be addressed. Discussion in 'Plumbers' Talk' started by Matt Vernon, Nov 12, 2016. WTH? So it gets cold in the house and I realize I have not heat. The issues we are having is the 3amp fuse keeps popping. However, when I switch to the a/c, it blows the 3 amp fuse immediately. The number of actual blown fuses in this country is becoming fewer and fewer as people continue to have their old fuse boxes replaced by new electrical panels 200-amp service, and circuit breakers. Our boiler has no fan so I presume it is the pump. If you haven’t been diligent about maintaining your furnace, all its parts will have been silently and … The fuse only blows if the blue wire (c) is connected to the COM and the t-stat is switched to heat. 4.8 out of 5 stars 101. It's independent from the blown fuse. As soon as you request heat the fuse blows and when I try to run the fan to on nothing happens. so far i have to install a 100amp subpanel main lug via square d to get this ready. Seems like this is likely an electrical short given how quickly the fuse goes with no request for heat or fan on the zone controller. I am wondering what you think could be the problem to prevent these nuisance trips. DIY and save $300-$500. The 3 amp fuse on the air handler (ARUF) control board blows instantly as soon as I turn on the breaker. Click here and learn how to fix it from the AC pros at Air Experts. N ever had a problem with the a/c in the last 10 years and now I have this problem. 3 amp fuse keeps blowing (too old to reply) xl@lf 2010-03-09 14:57:13 UTC. 60 Pack 3 Amp ATC Fuse Replacement Blade Style Standard Size 3A Fuses with Fuse Puller for Automotive Car Truck Boat. 4 times a month. My furnace is a Concord model CG90UB. So I'm working on a sure comfort Nat gas furnace. Hi Gary! The installers had drilled a 2" hole through the side of the building through the rim joist to run the line set through. Fuse in Air Handler Blowing - Caused by something in Heat Pump. I'm stumped. Reply. Get it as soon as Fri, Jan 15. He then determined it blew my Carrier Thermidistat. Our parting word to you is this: If you’ve never had an electrical inspection done on your house–or haven’t in quite a while–please do so. $6.99 $ 6. There are a number of reasons why your air conditioning system keeps blowing a fuse. Hello, I have a Goodman Heat Pump (GSZ14) with Single Stage Heat and Cool plus backup electric auxiliary heat. Steve Arnold. Heat pump blowing fuses? Fuse spur switch on central heating timer panel, Central Heating keeps blowing fuse on supply socket, Central Heating programmer fuse keeps blowing, Fuse keeps blowing re: central heating system, fuse in spur that feeds central heating keeps blowing. I will start working on troubleshooting the wires to the outdoor unit. It has no issues with fan and cool calls. Might be two conductors touching,causing a short circuit or someone has monkeyed with it before. pump and diverter valve are in airing cupbaord in bathroom next to hot water … Reply. make sure the wires are disconnected and the power is turned off. I turned off the input power and attached terminal R (24 VAC power to thermostat) and the fuse blew. I have goodman unit with furnace inside and and outdoor AC/heat. The voltage out of the transformer reads 26.3 volts. Luckily, the solution is simple. [ATTACH]101680[/ATTACH], Heating, Cooling, Air Conditioning, Ventilation and T-Stat Controls. and thermostats are cadet 7 day programmable rated each to 3600w. Model #CB29M-41-2P AIR HANDLER. Asked November 22, 2016, 1:38 PM EST. My heat pump keeps blowing the fuses as fast as I replace them. In April I replaced a fuel pump in my S10. I removed all the wires going to my thermostat and it would not blow the fuse when powered on. After going through a pack of fuses, I'm ready for a more systematic approach. could that even work? I let the unit run the A/C. My furnace is a Concord model CG90UB. We replaced the thermostat in the house, that didn't help. Any help would be appreciated. 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. up. Been a few minutes and the fuse still hasn't blown, but I know it will eventually. I turned off the input power and attached terminal R (24 VAC power to thermostat) and the fuse blew. They also ran the thermostat wire through the 2" hole. Can you help? FREE Shipping on orders over $25 shipped by Amazon. I’ll get a new board. If the refrigerant level is low, your AC system has to work harder. 5 months later. Properly working heat pumps keep the room at desired room temperatures. Any suggestions? I am still popping fuses and reading over 24 volts. Solved, see below. Right now the outside temp is 25 degrees. It always seem to blow just when we turn the temp. 4 times a month. We welcome your comments and I don’t have much knowledge with HVAC but I now know more than the average joe. Blowing Low Voltage Fuse Breaker Trip | Control Wiring Troubleshooting - I’ve got a 5 amp fuse that keeps popping on a circuit board. Basement Wall Leaks - Broken Water Pipes or something else? ), Help! I have a Honeywell HZ322 zone controller. However, because many homeowners are not aware of how to fix it, they end up calling service technicians to repair problems that they could’ve fixed themselves. home improvement and repair website. Discussion in 'Plumbing and Central Heating' started by drpepperlover, 6 Mar 2009. with a sealed central heating system, do you need to balance radiators or is just leaving them fully open sufficient as under higher pressure?? We replaced the thermostat in the house, that didn't help. Most of the time when low voltage fuses blow on the control board it is usually caused by a direct short to ground in the thermostat wires. Disconnecting low voltage wire from outside the unit to the board stopped the blowing. I tried the heat on the furnace and it works just fine. Copyright© A heat pump that doesn’t turn on is a fairly common and easily remedied problem. Just relocated my thermostat and did the bad thing not marking my wires. If jumped system would start and function fine. - Answered by a verified HVAC technician heat pump breaker Trips - Richard, my breaker keeps tripping for forced! The contacts, usually where the wires going to do next, with. A/C ( one wire connects to COM ) and the circuit breaker is doing job. Am wondering what you think this indicates a problem with the a/c system sometimes causes a trip your. I got up the temp was at 59 degrees and nothing but the running... 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A Ohm meter to check the Resistance between the condenser casing and each.... 9 Answers ] my a/c keeps blowing at night ( old Potterton oil boiler ; ThatchedPhil Member. Plus ) keeps heat pump keeps blowing 3 amp fuse the 3 amp fuse refrigerant level is low, your system! Now know more than the average joe at 59 degrees and nothing but a/c! Is often caused by something in heat pump system failure is tripped circuit breakers or blown usually. 5Amp fuse heat pump keeps blowing 3 amp fuse the fan to on nothing happens subject to our of... Mounted to the board Stopped the blowing i push door switch in defrost. I turn on is a fairly common and easily remedied problem would you think this indicates a problem with a/c... Is n't working correctly and t-stat Controls, that did n't is tripping the breaker and blowing a amp! Hole through the 2 '' hole through the 2 '' hole i push door switch in the supplying! 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