Why is My Furnace Blowing Cold Air?

Has your furnace been blowing cold air? It’s important to troubleshoot the issue as soon as possible. In many cases, it’s a simple fix, like replacing a clogged air filter or cleaning a dirty flame detector. However, in some cases, your furnace may have a more serious problem. In this blog post, Intelligent Air Services, LLC will discuss some of the most common reasons why furnaces blow cold air and how to fix them. Keep reading to learn more about why your furnace might be blowing cold air!


A common reason a furnace blows cold air is a problem with the gas supply. If there is not enough gas flowing to the furnace, it will not be able to generate enough heat to warm your home. This can be caused by several things, such as a blocked gas line or an incorrect setting on the thermostat. If you suspect that this is the problem, it’s important to call our team at (512) 675-6997 to have it checked out and repaired.


Another common reason for a furnace blowing cold air is a pilot light issue. If the pilot light goes out, the furnace will not be able to ignite the gas and create heat. A drafty room or a dirty flame detector can cause this.


A clogged air filter can also cause your furnace to blow cold air. When the air filter is clogged, it restricts the flow of air to the furnace and prevents it from operating at its full capacity. This can lead to the furnace blowing cold air instead of warm air. To prevent this from happening, it’s important to check and replace your air filters regularly.


If your furnace is blowing cold air, you must check to make sure your thermostat is set correctly. If it is set to the “On” setting instead of “Auto,” your furnace will run all day, even if it is not blowing warm air. Always make sure it is set to “Auto” so your furnace will only run when heat is being produced.

Is your furnace still blowing cold air after trying these troubleshooting tips? If so, then it’s time to call Intelligent Air Services, LLC for help. One of our certified technicians will be able to diagnose the problem and make the necessary repairs. Contact us today by giving us a call at (512) 675-6997 or filling out our online contact form.