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Why is My Gas Furnace Blowing Cold Air?

November 13, 2018

As the weather changes, the more you feel the cooler air gusting outside. And … in your home? If your gas furnace is blowing cold air and giving a chill to your Carpentersville home, it’s time to contact Controlled Comfort HVAC Inc. Once in a while the loss of warm air from your gas furnace means a major repair, but often it can be a small fix. Here are some of the main reasons your gas furnace could be blowing cold air instead of keeping your home toasty.

Your furnace might be overheating

If you haven’t had regular maintenance performed on your gas furnace lately and you’ve neglected to replace your air filter, both could indicate why your furnace is blowing colder air. A dirty air filter can block air from flowing freely through your furnace. If that happens, the furnace may overheat and cause the burner to shut down.

Your pilot light may have gone out

It could be that a lack of warm air from your gas furnace can be related to something as simple as a pilot light that’s gone out. It’s possible, particularly with older furnaces, for a gust of air to put out a pilot light. Other causes of an extinguished pilot light are defective gas valves or a faulty thermocouple.

Your furnace is dirty

Just as a dirty air filter can mean challenges for your gas furnace, so can other furnace components if they aren’t correctly cleaned. A dirty gas burner or flame sensor could cause your furnace to fight to stay lit and leave you in the cold.

Your ducts may not be properly sealed

When ducts are correctly sealed or if they have any cracks or holes in them, you may be losing a lot of heated air before it even reaches the vents throughout the home.

No matter what the root of the problem is, Controlled Comfort HVAC Inc in Carpentersville can help you get your gas furnace up and operating at an efficient level again. We can also help keep it running with routine, preventive maintenance. Call our experts at 224-412-8308 or arrange an appointment with us online and we’ll be there to help.