Lennox 80UGH3/4-120A-3. 22ish years old. Furnace hasn't been firing.
First time, I though it was flame sensor. I cleaned it. Ran for a while.
Next time, I was checking to see if the inducer was seized and spun it manually. Fired up fine for a couple of days.
This time, the only thing that would make it go was giggling the wires to the inducer. It goes into Watchguard mode otherwise. The furnace will start to spin up and I saw sparks in the red circle location. When there is a connection, the inducer spins fine. Seem like it is shorting out.
Do I have to replace the whole thing, or can you service an inducer assembly?