Digital thermostat set to Fan On mode causing furnace blower to run constantly

Furnace Blowing Air Constantly

ByDavid Simons

HVAC Services Furnace Blowing Air Constantly? The Thermostat Might Be the Problem When your furnace keeps blowing air even after the set temperature is reached, something is not right. We recently fixed this exact issue for a homeowner who replaced the thermostat himself.At first, everything looked normal. The temperature on the screen matched the set…