Why Is My Furnace Not Blowing Hot Air?


If your furnace isn’t blowing hot air, there could be a few serious issues. It’s not always as simple as changing a filter.

Do you need furnace repair?

You might be frustrated in the middle of cold winter, but knowing what to do can help prevent expensive mistakes. Using your furnace improperly can create more problems than simply going without heat.

Let’s look at a few common problems and how to solve a furnace not blowing hot air.


Common Causes of Furnace Not Blowing Hot Air

There are several common causes of a furnace not blowing hot air. One of the most common is when the filter is clogged. A blocked air filter restricts air flow, so the heated air cannot escape through the vents.

Additionally, if the flame sensor is covered with dirt or dust, it can cause the furnace not to turn on. The blower motor can become worn out over time, so it won’t be able to turn on or blow enough hot air.

If the gas valve is not opened, the gas cannot be ignited, so the furnace cannot produce heat. Lastly, if the thermostat is set to low, the furnace won’t receive the signal to turn on and blow hot air.

Steps to Troubleshoot Your Furnace’s Lack of Heat

When your furnace is not blowing hot air, it can be a frustrating experience. Fortunately, troubleshooting the issue can resolve it quickly and easily.

Check Your Furnace Filter for Blockage

If your furnace is not blowing hot air, the most common cause is a blockage in the filter. The filter has to be changed regularly in order to provide sufficient airflow.

If the filter lies clogged for too long, it may prevent air from traveling through to heat your home. If you suspect your filter is to blame, check it to verify the cause.

Inspect the Ignition and Flame Sensor for Malfunction

This is part of the ignition system that is responsible for burning the fuel to heat the home. The flame and ignition sensor will sense the presence of a live flame or hot surface and will turn off the furnace if something doesn’t register.

This means that the furnace won’t generate hot air and may stop providing warm air entirely. As a result, if it senses something isn’t functioning properly, then a professional needs to be contacted in order to inspect the ignition and flame sensor.

When the issue is located, they will be able to provide the necessary repair to ensure the furnace runs properly and heats the home back up.

Troubleshoot the Thermostat and Respective Wiring

You will need to check the thermostat, its settings, and any wiring that runs to or from it. It’s important to always respect any wiring coming off the thermostat by turning off the power before attempting to service it.

Once you have it powered off, inspect the wiring to make sure that it is all connected properly. Then, test the thermostat settings to make sure they are correct. Check out this website with heating services.

Explore Why Furnace Not Blowing Hot Air

If you’ve determined that your furnace is not blowing hot air, it’s important to take action right away. Have a qualified heating professional diagnose and repair the issue as soon as possible.

Don’t wait – repairs can save you money and ensure your comfort all season long. Get the problem fixed before it triggers a much more severe issue down the line.

Did you find this article helpful? Check out the rest of our blog.