Furnace Operation in Subzero Temperatures
Your Furnace is Working Properly if it is Producing Warm Air but not reaching the Thermostat Setting.
Example: Thermostat = 70 Degrees | Actual Tempurature = 65 Degrees
Scheduling a technician to perform a service call will not help the temperature in your house. If your furnace is continually running and still heating, it is working as designed during sub-zero temperatures.
Furnaces are designed to heat your home to around 70 degrees when the outside temperature is at 0 degrees. Once the outside temperatures drop below zero, a furnace may not reach the set temperature. However, the unit is still working as designed. Once the outside temperature begins to rise, your furnace will return to normal operation.
- Change your furnace filter: A clogged filter makes your furnace work even harder.
- Keep your thermostat at a fixed temperature during extreme cold. Do not lower it while you sleep, as it will have to work even harder to get warm again.
- Install and test carbon monoxide detectors.
If your unit is not turning on at all, please schedule a service call.