How to Clean a Floor Furnace

Person adjusting the wall thermostat
  • 1-2 hours
  • Beginner
  • 125-200
What You'll Need
Damp Cloth
Vacuum cleaner
Garden hose
What You'll Need
Damp Cloth
Vacuum cleaner
Garden hose

For trouble-free operation, it is important to clean your floor furnace regularly.

Regular cleaning will ensure you don't get a buildup of grime in vital components, but this should be accompanied by annual maintenance carried out by a qualified technician to reduce the risk of parts failure.

Depending on the type of floor furnace you have, the procedure to access the parts may be different from that stated below. However, all of the components will be the same.

Step 1 - Turn Furnace off

Turn the control valve to the off position and allow the floor furnace to cool down fully. Do not attempt to clean the furnace while it is warm, as you are likely to get burned.

Step 2 - Remove Register

floor furnace vent

Remove the floor grill and the register that surrounds the heat exchanger. Use a vacuum cleaner to clear out any accumulated dirt from the area. Wipe the parts down with a damp cloth.

Do not use any solvents or cleaning solutions as they may leave a residue behind which will burn when you turn the furnace back on. This burning residue often results in an unwelcome smell, which will permeate your home.

Step 3 - Inspect Burners

Remove any protective coverings from the burner and unscrew it from the manifold. You should now be able to slide the burner out of the furnace.

Examine the burner closely for any damage or distortion and have it replaced if there is a problem. Even a small amount of distortion in the burner can cause a problem so it is important to check closely.

Check for any spider webs or dust build-up if the floor furnace hasn't been used for some time. These can prevent the burner from functioning correctly.

If there is an excessive amount of dirt, it can be washed out using a garden hose and clean water.

Step 4 - Clean Burner Ports

Use a toothpick or wire brush to remove any dirt from the burner holes. Accumulated dirt can prevent the burners from lighting correctly so the floor furnace will produce less heat or, in some cases, no heat at all.

Wipe the parts down with a damp cloth.

Step 5 - Inspect Other Components

inside of a furnace

While you have the furnace disassembled, take the opportunity to inspect the heat exchanger and venting system for any cracks or blockages.

Keeping on top of any developing problems will save you from finding out about them on a freezing cold day when the floor furnace stops working!

Step 6 - Reassemble Furnace

When you are satisfied that all of the components are in good condition and have been wiped down with a damp cloth, you can replace the burner inside the furnace.

Make sure you tighten the retaining screws securely and put all of the components back in the correct position. When you have finished replacing everything, put the floor grill back in position and check that the floor furnace operates correctly.

If you smell gas, turn the furnace off immediately.