Few things can make life in your Broken Arrow home more frustrating and uncomfortable in the winter than a furnace that's blowing cold air. Several issues could cause your furnace to act up in this way. Keep reading to learn more about these issues with cold air and what you can do to restore normal functioning to your furnace.
Thermostat Settings
If your thermostat is set to "On" rather than "Auto," the furnace fan will run continuously, including when your furnace isn't producing heat. As a result, the system may circulate cool air between the heating cycles. Change the thermostat fan setting to "Auto" to ensure that the blower runs only during the heating cycles.
Clogged Air Filter
An air filter clogged with airborne pollutants restricts airflow and can lead to overheating and short-cycling of the furnace. If your furnace is blowing cold air and your thermostat has been set correctly, you may need to remove and clean (or replace) your filter.
The Pilot Light Has Gone Out
If your gas furnace has a pilot light and is blowing cold air, the reason could be that the pilot light has gone out. If you've set your thermostat correctly and see that there's no flame when you check the pilot light assembly, you'll need to relight the pilot flame. Furnace instruction kits usually have details on how to check and relight the pilot light.
Flame-Sensor Problems
A flame sensor that's worn out or covered in dust, dirt, and grime will make your furnace shut off because of its inability to detect the burner flame correctly. Cleaning the flame sensor may solve the issue. You may also need to have the sensor replaced.
Leaky Ductwork
Cracks and holes will allow warm air to escape and cold air to enter your ductwork and be circulated throughout your home. Duct sealing will eliminate these leaks.
Clogged Condensate Drain Lines
The latest furnace models have condensate lines to help remove excess moisture. Your furnace may not work properly if there's a blockage in the lines. It's best to have an HVAC professional clean clogged furnace-drain lines.
If your furnace is blowing cold air despite your best efforts to rectify the issue, don't hesitate to contact an HVAC professional. Don't forget that furnace maintenance will help you avoid this and many other problems. Contact Air Assurance if you need furnace installation, repair, or maintenance in the Broken Arrow area.