Why is My Gas Furnace Blowing Cold Air?

November 13, 2018

As the weather changes, the more you feel the cool air blustering outside. And … right inside your house? If your gas furnace is blowing cold air and adding a chill to your Monroe home, it’s time to reach out to Lanz Furnace and Fireplace. Occasionally a lack of warm air from your gas furnace calls for a major repair, but many times it can be an easy fix. Here are a few of the more common reasons your gas furnace might be blowing cold air instead of keeping your home toasty.

Your furnace could be overheating

If you haven’t had ongoing maintenance performed on your gas furnace recently and you’ve neglected to replace your air filter, either could be the reason why your furnace is blowing cool air. A dirty air filter can block air from flowing freely through your furnace. If that happens, the furnace could overheat and cause the burner to shut down.

Your pilot light may have gone out

It’s probable a lack of warm air from your gas furnace can be attributed to something as simple as a pilot light that’s gone out. It’s possible, specifically with older models, for a breeze to extinguish a pilot light. Other reasons for an extinguished pilot light are defective gas valves or a faulty thermocouple.

Your furnace is dirty

Just as a dirty air filter can cause issues for your gas furnace, so can other furnace components if they aren’t appropriately cleaned. A dirty gas burner or flame sensor could cause your furnace to battle to stay lit and not be able to bring warmth to your home.

Your ducts may not be properly sealed

If your ducts aren’t sealed properly 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 culprit of the problem is, Lanz Furnace and Fireplace in Monroe can help you get your gas furnace up and working at an efficient level again. We can also help keep it running with routine, preventive maintenance. Call our experts at 608-291-3606 or arrange an appointment with us online and we’ll be there to help.