I did a recent service call and the 5 amp fuse in the circuit board on the furnace was blown.
Goodman furnace control board fuse.
My guess is that you wasted a lot of time and money replacing the blower motor and transformer.
Can you guys point me in right direction to figure this one out.
He just called and told me fuse is blown again.
The control monitors and sequences operation and offers 100 percent gas shutoff in case of ignition failure.
Here s how to diagnose a low voltage short.
Should i check amp draw on compressor and both fan motors.
Also replaces select control board models from ti utec and white rodgers.
My furnace is a concord model cg90ub.
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.
When you have the door off of the furnace and can see the control board take a look right next to where the c g r w y and twin terminal are and you should see a small car type plug in fuse.
The guy has a new condensing unit installed last year.
Pull that fuse out and hold it up to the light.
I then tested the r to w with the thermostat in the off position and the button pushed in for a c power and got 48v.
The model number of the goodman furnace is gks9.
The control boards on goodman furnaces go out all the time and that is where the problem lies.
See if the filament is broken or the fuse has blown.
If the fuse keeps popping in your air conditioner you have a 24 volt short.
Costs around 142 00 if you don t have an a c license.
Its just being used for cooling right now.
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Furnace control board designed for goodman and janitrol brand 80 percent and 90 percent afue furnaces with b18099 xx series control boards.
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.
I removed all the wires going to my thermostat and it would not blow the fuse when powered on.
It isn t the hsi inducer or blower motor as these are all high voltage parts not low voltage.
I was blowing the 5 amp fuse on the control board for my forced air gas furnace.