Why is My Gas Furnace Blowing Cold Air?

November 13, 2018

As the seasons change, 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 Marshalltown home, it’s time to contact B & G HVAC. Sometimes an absence of warm air from your gas furnace results in a big repair, but many times it can be an easy 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 routine maintenance completed on your gas furnace for some time and you’ve neglected to replace your air filter, both could be the reason why your furnace is blowing colder air. A dirty air filter can stop air from flowing freely through your furnace. When this happens, the furnace could overheat and shut down its burner.

Your pilot light may have gone out

Sometimes 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 systems, for a draft to extinguish a pilot light. Other factors when it comes to an extinguished pilot light are faulty gas valves or a faulty thermocouple.

Your furnace is dirty

Just as a dirty air filter can mean problems 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 struggle 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 properly 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, B & G HVAC in Marshalltown 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. Contact us at 641-323-1210 or schedule an appointment with us online and we’ll be there to help.