Originally Posted by
mygirlsdad77
lots of things to take into account. How cold it is outside. furnace may be undersized, so on so on. If furnace is keeping the house warm to thermostat setting, then i would say you are ok. If furnace seems to run constantly and its not keeping temp in house constant, then you may have a problem.
Can you tell me what type of thermostat you have? If it has a merucry bulb, then its time to upgrade thermostat. Get an electronic or digital thermostat. j
Please let me know about your current thermostat, send pic if possible. I will try to help, if possible.