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HVAC Education, Buying Tips, Furnaces, Technology

How to Clean a Gas Furnace

To maintain your gas furnace and keep it running efficiently, we recommend annual servicing from a trained HVAC professional. At a minimum it should be cleaned at the beginning of each heating season, but repeating mid-year will help keep your gas furnace in peak condition and help prevent future problems. We recommend that you contact your Carrier expert to perform this service.


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How to Clean Your Gas Furnace


Below are some steps your Carrier expert may complete.

  • Turn the furnace off and wait until it has cooled down.
  • Make sure the pilot light is off.
  • Clean exterior surfaces with a damp cloth.
  • Vacuum dust from around the furnace.
  • Clean the blower using a small brush and a vacuum.
  • Clean the blower assembly with water and a mild soap.
  • Vacuum the burner and blower cavity.
  • Blow air directly onto the pilot to remove dust.
  • Clean the flame sensor by gently pulling it out of the bracket and cleaning it with a soft cloth. Place the sensor back into the bracket.
  • Clean the heat exchanger block with a damp cloth or brush to loosen dirt, and then vacuum.
  • Replace the air filter, which should be changed every three months.
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