How do you clean the flame sensor on a Lennox Elite furnace?

The Process of Cleaning a Furnace Flame Sensor

  1. Turn off the furnace power.
  2. Turn off the gas valve.
  3. Remove the furnace flame sensor.
  4. Clean the sensor with an emery cloth.
  5. Return the flame sensor.
  6. Restart the furnace.

How do I clean the burners on my Lennox furnace?

Remove dirt and dust

  1. Inspect the burner flames.
  2. Vacuum out the burner and blower cavities and clean away dust or debris in and around the unit.
  3. Remove the blower to clean it.
  4. Vacuum and brush the blower blades.
  5. Clean the flame sensor.
  6. Check the flue for gaps or dents and make sure it is venting properly to the outdoors.

How often should you clean your furnace flame sensor?

The service life of a furnace is 10 to 20 years on average. This means you’ll have to replace a flame sensor once, twice or three times over the course of the furnace’s life. Having a bad flame sensor is completely normal–you just need to know how to properly identify when it’s gone bad so you can replace it on time.

How do you clean a dirty flame sensor rod?

Clean the Sensor Once you have removed the sensor, gently rub the metal rod (and nothing else) with a very light grit sandpaper. Remember, you’re not sanding down an auto body here, just ridding the sensor of any buildup. Then, use a clean paper towel to wipe clean any dust left behind by the sanding.

How do I know if my furnace flame sensor is bad?

Signs of a bad flame sensor

  1. Furnace burners turn on but go out after a few seconds.
  2. Soot and other debris is covering the end of the sensor (cleaning the flame sensor may fix this issue rather than a flame sensor replacement)
  3. Tip of flame sensor is black.
  4. Porcelain/sensor casing is cracked.

Can you clean the flame sensor on a Lennox furnace with sandpaper?

Cleaning the flame sensor with sandpaper can make it more difficult for the component to successfully sense the flame. Lennox gas furnaces contain an important safety component known as a flame sensor.

How do I clean the inside of my Lennox Furnace?

Vacuum out the burner and blower cavities and clean away dust or debris in and around the unit Check the flue for gaps or dents and make sure it is venting properly to the outdoors Schedule a visit with a Lennox Dealer to make sure your equipment is running at peak efficiency.

How does a Lennox gas furnace work?

Mattingly-Arthur is studying travel and tourism through Penn Foster Career School. Lennox gas furnaces contain an important safety component known as a flame sensor. As long as the component senses the flame, it sends a message to the main furnace control board telling it to keep the main burner on and the gas valve open.

How often should I replace my Lennox air filter?

Replace one-inch pleated filters once a month. If you’re unsure of the type of filter to use, your Lennox Dealer can recommend one based on your specific system. For all other filter sizes, your Lennox Dealer will check, clean or replace them at your annual maintenance visit.