My furnace is not working. I see that the inducer motor (Fasco 70623925) is not spinning (it turns freely when I spin it by hand though). The motor threatens to run when the heat signal is received, but stops within a few milliseconds. I noticed two things:
- When I disconnected the inducer motor from the main board and checked the voltage received in the cable from the board (white and black wires) after the heat signal, sometimes it gets 120V (as it should), but sometimes it gets something around 3V only. Why is this happening? Is my board bad?
- When I plug the inducer motor to the board, the voltage reading goes up after the heat signal, but then very fast it goes to 0V where it stays. What can cause it?