Furnace Control Board Blown Fuse

Your furnace s control board has a separate fuse that protects it from getting too hot.

Furnace control board blown fuse.

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 my. Furthermore i would remove all the control wires from the board. This stops the flow of electricity and thus acts as a circuit breaker. This will blow the fuse on the control board causing the draft inducer to not start which then stops the rest of the furnace functions from working properly.

If it is a low voltage fuse problem then you have a low voltage short somewhere. The contractor may be hanging up or shorting. Diy and save 300 500. This was done after i couldn t get an appointment soon enough for a.

Fuse on the circuit board blowing in your case you likely have a dead short somewhere in the wiring or a bad load that is going short to ground causing the fuse to blow. While your ac is working if there is a power surge or a short circuit the filament in the fuse melts. Amperage draw anything near the fuse rating would periodically blow a fuse. 3amp fuse blowing on goodmen furnace board replaced blower motor transformer filter capacitor control board a.

It isn t the hsi inducer or blower motor as these are all high voltage parts not low voltage. When a thermostat wire touches the metal frame of the furnace it can deliver more voltage than the wires are designed to handle. Most of the time low voltage shorts are in the thermostat wires. If the fuse blows when you have no low voltage wires hooked to the furnace then you have an internal problem like a bad limit gas valve connection or control board.

The coil in the contractor is 24v. Often this occurrence is also referred to as a blown fuse. I am guessing that you are referring to the fuse on your control board is blowing and not the high voltage fuse blowing. If someone is poking around your furnace and is not too careful they could more wires so that they come into contact with the furnace s wire frame causing them to short and blow the fuse on the furnace board.

Or just throw parts at it.