9 Reasons Your Furnace Isn T Blowing Hot Air
Thermostat Configuration One of the first things you should check if your furnace is blowing cold air instead of hot air is the thermostat, because this little device controls the temperature and fan on the furnace. The fan setting on the thermostat may be set to “on,” which would result in the fan continuously blowing air even when the temperature in the home is not low enough for the furnace to produce heat....