This is all helpful, thanks much. I do have a kill=a=watt. The furnace worked without a problem last night. I did turn on the stove briefly to make sure there was propane, even though I'm pretty sure one tank is half full and the other full. I'd used the fridge for a few hours on gas but switched it to electric hours before turning on the furnace Saturday night. Had not used gas on the WH. Aall this is information I can store in a Word doc. Just arrived home and will winterize and park it until we leave for winter. I'm going to try to find those contacts and clean them, if I can find them.
Any problem with vacuuming the furnace?