I have recently come across an issue with my thermostat and when and how my heat comes on.
My thermostat seems to be an old round Honeywell. I set my temp at 65 typically. As of last night my furnace has been coming on what seems like too early as it's already above the temp at 67-68 degrees and turning off at around 72-74. What would be causing something like this to happen?
Appreciate any help as it's cold up here in New England.