How to Service a Kerosene Forced-Air Heater


Because they produce carbon monoxide, portable kerosene forced-air heaters should never be operated indoors. Before operating your heater, read the owner's manual and safety precautions. Periodically service your heater to keep it operating safely. Specific servicing instructions depend on the manufacturer, so follow the manufacturer's directions.

Things You'll Need

  • Cloth
  • Compressed air
  • Soap
  • Kerosene
  • Wire brush
  • Container
  • Inspect the heater before each use. Check for loose nuts and bolts and any signs of damage. Don't use the heater if it appears damaged; consult the manufacturer for repairs.

  • Wipe the fan blades, motor and other parts of the heater, using a clean, damp cloth to remove dust. Use a can of compressed air to remove dust from hard-to-reach places. Wait for all of the components to dry before using the heater again.

  • Remove the air intake filter and clean as often as recommended by the manufacturer. Wash the filter with a mild soap and rinse thoroughly. Dry it completely before placing it back in the kerosene heater.

  • Service the nozzle of the heater as recommended by the manufacturer. Some manufacturers may recommend replacing the fuel nozzle. Otherwise, clean it at least once a year. Aim a can of compressed air at the front of the nozzle to remove dirt. If the nozzle contains stubborn particles, place the nozzle in clean, 1-k fuel-grade kerosene to soak. Rinse and dry thoroughly.

  • Remove the spark plug and clean it after 600 hours of use. Use a wire brush to clean the terminals.

  • Flush the fuel tank as often as recommended. Remove the drain plug and drain all of the fuel into a container. Replace the plug. Add 2 quarts of clean kerosene to the heater. Remove the plug and drain the fuel again. Replace the plug and add more fuel before using the heater.

Tips & Warnings

  • Dispose of used fuel in accordance with the laws of your municipality. A local automotive servicing business may offer fuel recycling.
  • Never store fuel for use the following winter. Old fuel may damage kerosene forced-air heaters.

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