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Duluth, GA Heating: How Can a Furnace Blow Cold Air?

Is your furnace blowing cold air in your Duluth, GA, home? Below are some of the reasons why this might happen and what it means for your home’s heating system.

The System has Dirty Flame Sensors

Some furnaces rely on flame sensors to regulate warm-air cycles. If the flame detector is dusty or dirty, it’s harder for the sensors to do their jobs, and the heater will stop emitting warm air. Fortunately, this isn’t a major repair. To restore warm air, you need to call a qualified service technician to clean the sensors and solve the problem.

The Furnace’s Condensate Line Is Clogged

Today’s furnaces have condensate drain lines that remove biological contaminants from the system. If you notice your heater is blowing cold air, a clogged condensate line might be to blame. These state-of-the-art heaters detect blockages in the line and turn off the burners to protect the system from increased biological growth damage. Clearing the clog should get your furnace blowing warm air again.

The Ductwork Might Be the Problem

The reason your furnace is blowing cold air might have nothing to do with the system. It could be from damaged ductwork. If your home’s ductwork has holes or cracks, cold air from the attic or basement gets in and releases back through the vents. Also, the warm air your heater produces is likely leaking out before it gets to the vents. Duct sealing can keep warm air in and help heat your home more efficiently.

Getting to the root of why your furnace keeps blowing cold air is essential to your comfort and keeping your energy costs low. Other reasons heaters emit cold air include:

  • Thermostat setting is on AUTO
  • Low gas supply
  • Restricted airflow

Guessing what’s causing your furnace to blow cold air won’t solve the problem but calling HVAC professionals will. Schedule heating repair services with the pros at Ful-Bro Heating and Air Conditioning Inc. today!

Image provided by iStock

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