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Furnace Problems: Furnace Blowing Cold Air

Furnace blowing cold air

With Ottawa’s winter approaching, it’s time for your furnace to battle the cold. If you’ve fired up your furnace only to find it blowing cold air, we understand your concern. Luckily, there are a few troubleshooting steps you can take to identify the issue and get your furnace back in shape.

1. Check Your Thermostat

Start with your thermostat. If it’s set to “ON,” the fan runs continuously, which means that when the furnace shuts off, cold air will circulate throughout your home. Switch the fan setting to “AUTO” so it only runs when the furnace is heating. This simple adjustment can often resolve the cold air issue.

2. Dirty or Clogged Air Filter

A dirty or clogged air filter can restrict airflow, potentially causing the furnace to blow cold air. Fortunately, cleaning or replacing the air filter is an easy task for homeowners. This small step can ensure that your furnace runs properly and optimally. 

3. Overheated Furnace

If your thermostat is correctly set and your air filter is clean, but your furnace is still blowing cold air, it might be overheating. Furnaces have a safety switch that trips when the system gets too hot, causing it to push cold air through your home. In this case, it’s best to contact your local HVAC company. 

4. A Cracked Heat Exchanger

A heat exchanger is a crucial component in your gas furnace. It separates the combustion process from the air that warms your home. When a heat exchanger cracks, it can lead to serious problems:

  • Carbon Monoxide Poisoning: Harmful gases can leak into your living space.
  • Reduced Heating Efficiency: Your furnace may struggle to heat your home.
  • System Failure: A cracked heat exchanger can cause complete system failure.

If you suspect a cracked heat exchanger, it’s important to consult Team Harding immediately.

Schedule a Furnace Tune-up 

Annual furnace maintenance is the secret to a warm and worry-free winter. With professional furnace servicing from Team Harding, you can avoid inconvenient surprises and ensure your home remains cozy when temperatures drop. Keep the cold outside where it belongs, and enjoy the comfort of a well-maintained furnace all season long. 

Need furnace help? Contact Team Harding Today! 

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Team Harding has been Ottawa’s leading home comfort specialist since 1994. We are a family-owned and operated local business and all of our installers and technicians are fully licensed.

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