Why Does My Heater Blow Cold Air

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Why Does My Heater Blow Cold Air?

If you’ve turned on your heater and it’s blowing cold air, don’t panic. There are a few possible explanations, and most of them are relatively easy to fix.

Possible Causes

  • Dirty air filter: A dirty air filter can restrict airflow to the heater, causing it to blow cold air.
  • Clogged burner: The burner is responsible for heating the air that the heater blows out. If the burner is clogged, it won’t be able to heat the air properly.
  • Faulty thermostat: The thermostat tells the heater when to turn on and off. If the thermostat is faulty, it may not be sending the correct signal to the heater, causing it to blow cold air.
  • Low fuel level: If your heater uses gas or oil, it may not be blowing warm air if the fuel level is low.
  • Mechanical failure: In some cases, a heater may blow cold air due to a mechanical failure. This could be anything from a broken fan to a faulty heating element.

Troubleshooting Tips

  1. Check the air filter: The first step is to check the air filter. If it’s dirty, replace it with a new one.
  2. Clean the burner: If the air filter is clean, the next step is to clean the burner. You can do this with a vacuum cleaner or a brush.
  3. Check the thermostat: If the burner is clean, the next step is to check the thermostat. Make sure that it’s set to the correct temperature and that the batteries are working.
  4. Check the fuel level: If the thermostat is working properly, the next step is to check the fuel level. If the fuel level is low, add more fuel to the heater.
  5. Call a professional: If you’ve tried all of the above troubleshooting tips and your heater is still blowing cold air, it’s time to call a professional. A qualified HVAC technician will be able to diagnose and repair the problem.

Conclusion

If your heater is blowing cold air, don’t despair. Most of the time, the problem is relatively easy to fix. By following the troubleshooting tips in this article, you can get your heater blowing warm air again in no time.

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