We own a 100 year old farmhouse. Old furnace in great working order. We heat with a woodstove as well. Most nights after the woodstove burns out... 3-4AM, the thermostadt refuses to kick in to the gas furnace and we wake up cold. It has no problem during the day when we don't use the woodstove. WHY?
We have tried 3 thermostadts... all brand names... 1 traditional, 2 digital. Again no problem when run without woodstove. Woodstove on for 12-14 hours, that's when the trouble begins.
Thanks in advance.