Harvey Schneider
Minister of Fire
The thing that makes this significant is that the vac switch would be closed when the stove is off. I am not sure how the op checked the switch, but it was probably with power off. He did report zero ohms for one of the switches, I can't recall which. As soon as the combustion blower is running the vac switch would open inhibiting the auger motor.Another thought.
Many of these Vac switches have two ports. If the hose is connected to the wrong port he will never find it inspecting the wires.