Why Is My Furnace Blowing Cold Air?

February 5, 2021
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Winter nights get downright cold in Katy, TX, and you’ll need a reliable furnace to keep your home warm and safe. A furnace problem isn’t just a comfort issue. It can also put your family’s safety at risk. Here are three reasons why your furnace is blowing cold air and what you should do about it.

1. Pilot Went Out

Older furnaces have pilot lights. The pilot has to be on all the time. If the pilot goes out, the furnace can’t burn fuel. Check the pilot, and relight it if it’s out. If it goes out again, there could be a burner, sensor, or airflow problem.

2. Cracked Heat Exchanger

A cracked heat exchanger may cause your furnace to stop heating. The furnace’s safety switch will automatically turn off the gas, but the blower might continue blowing room-temperature air through your vents. Heat exchanger problems often begin with a dirty air filter. Be sure to check the filter monthly, and schedule an annual furnace maintenance visit with our skilled technicians.

3. Faulty Thermocouple or Valve

A pilot that keeps going out could be caused by a failed thermocouple. The thermocouple is a switch that activates the gas valve and ignition. If it’s damaged, professional attention is needed. If you have a newer furnace, its electronic ignition could be damaged. The wires may have cracked or frayed, or there could be grime in the way of the sensor. A furnace inspection is always needed when the unit blows cold air.

Air Express Air Conditioning & Heating is proud to be the trusted provider of furnace repairs in Katy. You can also count on us for high-quality heating and cooling maintenance and installation as well as air conditioning repair. Our indoor air quality services keep your home’s air as healthy as possible. If you’re a business owner in or near Katy, our commercial heating, ventilation, and air conditioning services are cost-effective and timely. To learn more about why your home’s furnace is blowing cold air, get in touch with us at Air Express Air Conditioning & Heating today.

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