Keep your thermostat at 66 to 68 (or whatever temp is comfortable). I disabled all the smart Nest stuff. If you don't have the neutral wire the Nest can caus

Keep your thermostat at 66 to 68 (or whatever temp is comfortable). I disabled all the smart Nest stuff. If you don't have the neutral wire the Nest can cause control board issues as it sips current. I think the battery backup ones are probably the best in retrospect. If you Google your furnace model you may find you tube videos with similar issues or things to check.