Furnace Circuit Board Fuse Keeps Blowing

The guy has a new condensing unit installed last year.

Furnace circuit board fuse keeps blowing. If the fuse keeps popping in your air conditioner you have a 24 volt short. This guide to electric furnace troubleshooting explains the common causes and fixes. Furnace fuse keeps blowing. Fuses are very sensitive to overload and so they overheat extremely fast.

The voltage out of the transformer reads 26 3 volts. Blowing low voltage fuse breaker trip control wiring troubleshooting i ve got a 5 amp fuse that keeps popping on a circuit board. Sometimes the blown fuse in the furnace comes from a malfunctioning transformer. Here s how to diagnose a low voltage short.

Now read more. Ac went down replaced said fuse and unit worked again for a few days then the fuse failed again. After resetting the circuit breaker and replacing the fuse if the fuse keeps blowing there might be an electrical short in the electrical system that supplies the electricity to the furnace. Can you guys point me in right direction to figure this one out.

This can be the sign of an electrical problem putting you at risk of a serious fire. The furnace fuse keeps blowing. 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. There could be several reasons why air conditioner keeps blowing fuse in circuit board.

Consequently if the fuse has blown it means you have a problem on hand for which you may require professional assistance. My ruud furnace achiever 90 plus keeps blowing the 3 amp fuse on the ifc circuit board. Its just being used for cooling right now. In this case you should call an electrician.

I am still popping fuses and reading over 24 volts. You need to find the root cause of the blown fuse on the furnace circuit board before. He just called and told me fuse is blown again.