Blowers: The blowers in your gas furnace circulate the heated air throughout your home. Without electricity, the blowers will not be able to operate, which means the heated air will not be distributed throughout your home.
Thermostat: The thermostat controls the temperature of your furnace and turns the furnace on and off as needed. Without electricity, the thermostat will not be able to function, and the furnace will not be able to maintain a consistent temperature in your home.
Safety features: Gas furnaces have several safety features that rely on electricity to function properly. For example, the flame sensor detects whether the burner flame is lit, and the limit switch prevents the furnace from overheating. Without electricity, these safety features may not work correctly, which could pose a safety hazard.
Therefore, while a gas furnace can technically produce heat in a power outage, it will not be able to operate fully without electricity.
