furnace blowing cold air

Why Is My Furnace Making My Home Colder in Aberdeen, NC?

November 21, 2022

Nothing sounds better than hanging out with your family or reading a book in a well-heated home during the cold season. However, this dream is impossible if your furnace doesn’t warm your Aberdeen, NC, home. Here are four reasons for a furnace blowing cool air.

Faulty Thermostat

The thermostat sends signals to your furnace control board to turn the heating system on. If this device ages or breaks, it may signal the furnace fan and fail to turn on the blower motor to warm the air. This malfunction will cause the furnace to blow cold air.

Incorrect Thermostat Settings

Your furnace could blow cold air if you set the thermostat to cool rather than heat your home. Additionally, setting the heating system fan to “on” instead of “auto” mode will cause the fan to blow cool air because it will continue to run when the set point is reached, making it feel like the heating system isn’t producing warm air.

Damaged or Leaky Ductwork

Your heating system distributes heat throughout your home through ducts. When these ducts develop a major leak, the heating system produces warm air, but the vents emit cold air, because the warm air is leaking into the attic or basement. Ensure that you hire a professional service technician to seal the holes or cracks in the ductwork.

Dirty or Clogged Furnace Filters

Over time, dust and other indoor pollutants can block furnace filters. Clogged filters prevent air from blowing over the heat exchange coils.

As a result, your heating system will overheat as it tries to push out the heated air. If the system overheats, safety sensors turn it off and start blowing cold air to cool the heating system.

To avoid this issue, clean or replace the HVAC filters regularly. If you are unsure about the correct filters for your heating system, request an experienced technician to advise you.

A heating system blowing cold air needs immediate attention to ensure that your Aberdeen, NC, home remains warm and comfortable all season. Contact our experts at Sandhills Heating & Refrigeration for your furnace repair needs.

Image provided by iStock

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