How to Clean a Propane Furnace

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Cleaning propane furnaces in the fall keeps them running efficiently through winter.
Cleaning propane furnaces in the fall keeps them running efficiently through winter. (Image: Jupiterimages/Comstock/Getty Images)

Running a propane furnace is often required if a natural gas source from a city is not available. Running propane is also cheaper in some areas than natural gas; but only if your furnace is properly maintained. Cleaning the furnace of soot and dust will not only increase the life of the heating unit, but will also help it burn more efficiently. Clean your furnace every fall before firing it up for the winter.

Things You'll Need

  • Screwdriver
  • Vacuum
  • Ratchet set
  • Brush

Remove the front panel from the furnace to access the inside. Push the release button for the access panel latch or remove the screws with a screwdriver if necessary.

Look at the burner flames while the furnace is still running to check for any blocked burner holes. Turn off the furnace by shutting it off at the electrical supply. Unplug the unit or turn off the circuit breaker that supplies the power.

Clean the burners of the furnace using a vacuum. Attach a long vacuum attachment or a piece of PVC pipe to the end of your vacuum to get to the back of the furnace. Remove all the dust that you see. If there is excessive soot, call out a service professional to adjust the burners.

Remove the nut that holds the furnace blower in place using a ratchet set. A 7/16 socket is often standard between models for the nuts.

Remove the two bolts that hold the blower in place and remove it from the furnace. Clean the fins of the blower with a stiff brush running the brush along the fan blades to keep from bending them.

Pull out the filters from the furnace and inspect them for dirt and debris. Replace them using the model number printed on the side.

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