Heater fine daytime, stops at night!
Heater is gas forced air and works fine in higher temperature daytime if in 60's, 70's. But if colder it won't turn on unless thermostat is manually moved back down then up so mercury trips again. Even had a hvac friend come out, test all of it, he replaced something but still same problem even after he checked it again but always during the day when it works fine. I put a new thermostat (non mercury switch) before he came and it didn't solve it either. It will go as hot as you want during the day and you can just put therm at 80 and it will go there. But when cold outside the only way to get it on for a few minutes each time is to rock the mercury and slowly creep up the setting, which I can't do from bed asleep. Any help appreciated:confused: