I am generally confident going on gas heating service calls, but one
thing (of a few) that I am fearful of encountering is a problem with
an ECM inducer draft motor. I've seen them on units, but they
have always thankfully worked.
Can those of you that have encountered issues spill every helpful
thing you know about them? The main goal, I suppose, is to
distinguish between issues with the main furnace control board
and the controller on the motor?