Thermostat or furnace problem?
My first though is my thermostat.....
My thermostat (Lux TX9000a) and furnace seem to work fine when they are on the program that I set. However, when I turn up the temperature to override the program, I start to have issues.
My thermostat will flash the word 'Heat' while the furnace is running. Oftentimes, the word will be flashing, while the temperature drops 10+ degrees with no activity from the furnace. Most of the time, this is when I am sleeping. If I manually turn the temperature down below the current temp, then back up, it seems to kick back on.
So, any guesses on this being a thermostat problem? I don't feel like spending the $ on a new thermostat (the current one is from Aug 06) if it wil' be wasted...