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Why Your Furnace Is Only Blowing Cold Air

Cold winter temperatures are on the way to Edmond, OK, and an unexpected furnace malfunction is the last thing you need on a frigid night. If you notice that your furnace is only blowing cold air, there are a few things you can do before calling us at [company_name] for a repair. Read on to learn some of the possible reasons why your furnace is blowing cold air and what you can do about it.

Thermostat Problem

An incorrect thermostat setting may cause your furnace to blow cold air. Make sure the thermostat is set to “heat.” Verify the temperature. Make sure the thermostat is set on “auto” instead of just “on.” The “on” setting allows the fan to blow without heating the air. The thermostat needs to be at a higher temperature than your home’s current air temperature. For example, if your home’s current temperature is 75 degrees Fahrenheit, your thermostat needs to be at 76 degrees or higher in order to kick on and blow warm air. A thermostat malfunction, such as a loose wire or low battery, may also cause cold air to blow from the vents.

Dirty Air Filter

Dirty air filters impede airflow. If you just feel a trickle of air, check the filter. The warm air might be stuck in the combustion chamber, which could cause the heat exchanger to crack. Check the filter monthly and replace it every three months or sooner.

Faulty Thermocouple

The thermocouple is a sensor. It controls the flow of gas to the pilot light. A thermocouple malfunction could prevent the furnace from burning fuel, but the blower may keep running. Malfunctioning thermocouples require professional repair or replacement.

[company_name] is the go-to source for furnace repairs in Edmond. We’re also prepared to provide you with dependable heating and air conditioning maintenance, repair, replacement, and installation. You can also count on us for air duct cleaning, duct installation and repair, indoor air quality, and mini-split services. For additional information about why your furnace is blowing cold air, give us a call.



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