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Help! Why Is My Heater Blowing Cold Air?


Your home’s heating system is made up of various components that all must work together to provide the warmth you and your family desire. Any time one of these parts isn’t working properly, you could end up with cool air flowing through the vents. Here are a few potential reasons your heater is blowing cold air.

Lack of Fuel

Every furnace needs a fuel source, whether it’s oil, gas, or electric. If there’s no oil in the tank, the furnace won’t supply heat. If it’s a gas system, the valves must be working properly to supply the furnace with fuel. Breakers must be in good working order when it comes to electric systems. Oftentimes, furnaces will blow cold air when there is a block in the fuel source.


If your heating system is blowing cold air, the thermostat could be the potential source of the problem. Your thermostat should be set for heating, and it needs to be set to a higher temperature than your home’s current temperature. If your home is 65 degrees, the system won’t respond to a call for heat if the thermostat is set at 65 degrees. Batteries should be changed to ensure low battery levels aren’t causing your home’s heating to malfunction. When batteries are low, the thermostat is unable to communicate with the furnace and therefore won’t supply warmer air.

Damaged Ductwork

If there are holes in the ductwork due to broken seals or improper installation, the furnace may be working, but the heat still isn’t reaching the vents. Cold air could be leaking into the ductwork, allowing hot air to escape. If your ductwork is damaged, you’ll feel cool air coming from your vents instead of the warm air being produced by the furnace. It’s essential to have experienced professionals install and inspect your ductwork to prevent any problems down the road.

Cleaning and Maintenance

Before the start of the heating season, maintenance should be done on your home’s furnace. It’s important to check and replace your filters on a regular basis. Old, dirty filters can block airflow and cause your system’s burner to shut down, which can make it tough, if not impossible, to heat a space. In addition, you’ll want to make sure maintenance is done to check for a dirty fan or clogged condensate pump. Issues concerning your unit’s fan or pump can prevent the burners in your HVAC system from functioning properly.

Call Air Tech of Central Florida to Restore Comfort to Your Home

When you have cold air blowing through your home’s vents, you’ll need an experienced professional to diagnose and fix the problem with your furnace. Air Tech of Central Florida has been serving Central Florida residents since 1998, and our team of NATE certified technicians are here to help solve any of your heating and cooling needs. From clogged drain pipes and leaking AC units to burning, plastic and gas smells coming from your system, we’ve got you covered. Contact Us with our simple query form to get started.

Author Bio:

Luigi Ferraro

Specializing in residential and commercial HVAC services, Air Tech offers a wide range of solutions to meet the heating and cooling needs of their customers. Their team of skilled technicians is trained to handle the installation, repair, and maintenance of HVAC systems with expertise and precision.

The post Help! Why Is My Heater Blowing Cold Air? appeared first on Air Tech of Centra Florida.

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