I have a classic bay 1200 that is not feeding pellets. The exhaust fan starts and the call for heat light is on when I raise the thermostat. I have replaced the vacuum switch and the auger motor, checked the vacuum hoses, and checked the stove door gasket - all seem to be fine. The control box isn't doing anything weird - one orange blink followed by several single blue blinks. The unit will light if I manually add pellets to the pot. I bought a multimeter and am hoping someone can tell me what settings to test each switch on, and what the readings should be across all three snap discs as well as the pressure switch. Right now, I am getting a reading of 0.9v going into and out of the vacuum switch, 120v in and 0 out on Snap disk 1 or 2 and 0.3V in and out on the other snap disc (I can't remember which is which right now. Snap disc 3 is giving me fluctuating in and out on both sides - sometimes at 120v. sometimes 90v, sometimes almost nothing, with no apparent reason for it. I've ordered a control box and hopefully replacing that today since there doesn't seem to be power to the vacuum switch and since Snap disc 3 power is inconsistent. I have two concerns - 1. the unit was running fine until it was cleaned professionally, and then it wouldn't properly start up again, making me wonder if something shorted out my control board and 2. I don't know what the readings SHOULD be a both sides of all switches/discs so that I can diagnose the thing next time BEFORE I go replacing every single part. Can someone Describe in detail what the readings should be? This single mom with a cold house sure would appreciate it!