Hi all. I've got an old Whitfield (Lennox) Cascade that I've been using for a little over a year. The other day I opened it up (ash vents, side panels, etc) to give it a thorough vacuum. When I closed everything up the motor wouldn't run. Auger light goes on and off as normal but that's it. If I flip it to "high" mode I get a quiet electric hum and nothing else. Is it possible I bumped a vacuum switch or something along those lines? I haven't busted out the multimeter yet...figured I'd mine the wisdom here first. Has anyone had a similar experience? Thank you!