Furnace Control Board Blown Fuse

Or just throw parts at it.

Furnace control board blown fuse.

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. This stops the flow of electricity and thus acts as a circuit breaker. 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. Your furnace s control board has a separate fuse that protects it from getting too hot.

3amp fuse blowing on goodmen furnace board replaced blower motor transformer filter capacitor control board a. 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. This was done after i couldn t get an appointment soon enough for a. Amperage draw anything near the fuse rating would periodically blow a fuse.

If it is a low voltage fuse problem then you have a low voltage short somewhere. Make sure you have a good fuse and then reattach them one at a time. Most of the time low voltage shorts are in the thermostat wires. When a thermostat wire touches the metal frame of the furnace it can deliver more voltage than the wires are designed to handle.

The contractor may be hanging up or shorting. The fuse is in the disconnect box or the trip box connected to your ac. I am guessing that you are referring to the fuse on your control board is blowing and not the high voltage fuse blowing. While your ac is working if there is a power surge or a short circuit the filament in the fuse melts.

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. It isn t the hsi inducer or blower motor as these are all high voltage parts not low voltage. The coil in the contractor is 24v. Diy and save 300 500.

Furthermore i would remove all the control wires from the board.