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.

Furnace control board 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. The contractor may be hanging up or shorting. Blows the 3 amp fuse on the control board for my goodman ac unit. The coil in the contractor is 24v.

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. 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. Or just throw parts at it.

Furthermore i would remove all the control wires from the board. Your furnace s control board has a separate fuse that protects it from getting too hot. 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. Amperage draw anything near the fuse rating would periodically blow a fuse.

Make sure you have a good fuse and then reattach them one at a time. It isn t the hsi inducer or blower motor as these are all high voltage parts not low voltage. Diy and save 300 500. This stops the flow of electricity and thus acts as a circuit breaker.

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. The fuse is in the disconnect box or the trip box connected to your ac. If it is a low voltage fuse problem then you have a low voltage short somewhere. 3amp fuse blowing on goodmen furnace board replaced blower motor transformer filter capacitor control board a.

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.