I have a Maple Chase 9500 non-programmable thermostat that resets itself to 78 degrees in the cooling cycle. It is getting to be every few days now.
Is this an indicator of something from the AC unit/ furnace? Or is the thermostat messed up. It is battery operated.
As far as I understand my system it is high efficiency LP furnace with a condenser or maybe a HP outside. The furnace is 15 yrs old (as is the thermostat) and the ac unit outside is over twenty years old.