When you feel cold air coming from your heating system in the winter, you’ll have a hard time staying comfortable at home in Opelika, AL. Fortunately, a technician can fix your furnace if it’s blowing cold air, and this could involve fixing the thermostat, electrical components, airflow or flame sensor.
1. Thermostat Issues
If you notice cool air coming from your furnace, first make sure your thermostat is on the “heat” and “auto” settings as opposed to the “cool” and “fan” settings. If this doesn’t resolve the situation, ask a technician to see if your thermostat needs recalibration.
2. Broken Electrical Control Board
Many modern furnaces come with electronic control boards that tell them when to turn on and what to do. If your control board malfunctions, it may incorrectly signal your furnace’s blowers to turn on without engaging the burners. In this case, a replacement control board should resolve the situation.
3. Airflow Blockages
A dirty air filter, leaks in your ducts or too many closed supply vents can cause problems with airflow and make your furnace work harder to heat your home. It may work so hard that it overheats and has to temporarily shut down its burners as a safety measure. However, the blower may continue to run, resulting in a scenario in which cold air gets distributed through your vents.
4. Faulty Flame Sensor
As a safety mechanism, your furnace’s flame sensor will shut down the burners if it detects a problem with the flow of gas. If the flame sensor doesn’t work correctly, it may shut down the burners unnecessarily. The blowers still might function, sending cool air out of your vents.
Determining if you have a problem with your thermostat, control board, airflow or flame sensor that has caused your furnace to circulate cold air, is a job for a professional HVAC technician. Contact Sensigreen to schedule a furnace repair appointment.
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