You know this issue, so let me just tell you what I’ve done to try and fix this, to no avail:
- Replaced vacuum switch (helped a lot initially)
- Replaced auger motor and optical sensor (ps; removing a stripped screw from the motor plate is no fun)
- Cleaned out exhaust blower (yes I know; should’ve been doing that all along; didn’t realize it until reading the repair manual)
- Replaced and regularly clean the plate in thhe rear of the heating chamber (the old one was cracked really bad)
- Had the service guy out to look at the stove; he determined that the optical sensor wasn’t plugged in. That worked for two days.
- Vacuumed out, unplugged, and replugged the new sensor. I suppose I could take it out and wipe it down, but that’s 30 minutes just to empty the hopper and undo the auger assembly.
- Changed the thermostat from manual to auto. I read on this blog somewhere that the two settings use different voltage so I thought that light make a difference.