Furnace won’t start before a cold night? Check the thermostat, filter, and breaker first
https://kameronregw146.cavandoragh.org/what-causes-frozen-ac-coils-in-summer
Furnace won’t start before a cold night? Check the thermostat, filter, and breaker first. If it still won’t fire, igniter or control board issues may be to blame. Emergency service can keep pipes from freezing.