Why Is My Furnace Blowing Cold Air?

winter furnaceVailes Heating and Air are experts in heating and cooling. There are a few simple reasons your furnace might be blowing cold air. Troubleshoot your furnace with these suggestions. If none of these work, call us at (540) 942-0198 or request service online and one of our professional technicians will be happy to assist you will all your heating needs.

Check your Thermostat

Make sure your thermostat is set on the correct setting. If it is set to “ON” the blower will run constantly even when the furnace isn’t heating any air. And the air that comes through the vents will seem cool because it is room temperature air. Turn your thermostat to “AUTO”, now the fan will only run when the furnace is heating and you won’t get tepid or room temperature air.

Change the Air Filter

A dirty air filter will cause your furnace to overheat. It restricts the air flow in and out of your furnace which can cause it to overheat. If it does overheat, the safety control will shut off the burners causing the fan to blow cool air versus heated air through the house.

Check the Pilot Light

Your furnace may be blowing cold air because the pilot light has gone out. It is a simple fix, just relight the pilot. If it continues to go out after you relight it a few times, then you should call us at (540) 942-0198 or request service online. This is indicative of a bigger problem that requires professional help.

Reboot Your System

If you have a modern furnace, you probably have one that is controlled by a computer. Sometimes there is simply a glitch in the system and it needs a simple reset, the same way you would restart your computer or phone. If you turn off your furnace for 30 seconds and then back on, it may reset itself and begin functioning correctly. If it doesn’t start working the way it should after you have restarted the computer, call us at (540) 942-0198 or request service online today.


The older you ductwork is, the more likely it is to be damaged or leaky. If you have a damaged or leaky ductwork air can be escaping before it gets to the desired living areas. Inspect the ductwork yourself, but its possible that you may not be able to visually detect the rips or tears that are causing your leak. It is best to call Vailes at (540) 942-0198 or request service online, for an in depth ductwork inspection.

If you are in Fishersville, Waynsboro, Stuarts Draft or any of the surrounding communities, Vailes Heating And Air is here to serve you day or night. Contact us and we will diagnose any problem you may be having with your heating this winter.

Need Service?

Contact the experts at Vailes Home Services.

Call us at 540-942-0198!

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