When temperatures drop, you rely on your furnace to keep your Lake Forest, IL home warm. If it blows cold air instead of warm air, you may have a hard time staying comfortable. Keep reading to learn about possible reasons why your furnace blows cold air.
Thermostat Issues
Whenever you notice a lack of warm air, first check the thermostat. If you have it set on the “cool” or “fan” settings, cold air may come out of your vents. If you’ve set your system to “heat” or “auto” and still have a problem, a technician may need to calibrate the thermostat or fix faulty wiring.
Clogged Condensate Line
A high-efficiency furnace will have a condensate line for draining water. Debris can sometimes clog that line. As a result, the system may turn off its burners as a safety measure to prevent further issues from arising.
Dirty Flame Sensor
The flame sensor performs a key role in keeping you safe from gas, as it turns off the burners whenever it stops sensing any flame. A dirty flame sensor may not be able to detect a flame, even one that’s going strong, and it could signal the system to shut off the burners. This can lead to cold air coming out of your vents.
Overheating
To prevent damage, a furnace will shut off its burners when it starts to overheat, and at this point, only cold air will flow through the system. Several factors could cause overheating, such as a broken heat exchanger, a dirty air filter or blocked vents.
If you notice that your furnace blows cold air, schedule an appointment so that an HVAC technician can determine the cause of the problem. For furnace repair services in Lake Forest, IL, contact Ireland Heating & Air Conditioning Co.
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