How To Clean Furnace Sensor

This is a safety mechanism.

How to clean furnace sensor.

The sensor might have dirt and soot deposits on its body and it might have turned greenish. Keeping the sensor clean is simple and requires just a few tools when you follow these easy steps. If the flame sensor can t sense the flame because it s too dirty the furnace may shut itself off. 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.

Shut off the power. However the furnace still shuts off after only a few seconds of the burners operating. Lennox gas furnaces contain an important safety component known as a flame sensor. To clean a furnace start by turning off the furnace then removing the access panel on the outside of the furnace and inspecting the filter for dirt or damage every 3 4 months.

The flame sensor is a thin metallic rod attached with a single screw below the burner. If your furnace flame sensor has become dirty with build up the furnace won t function properly. If cleaning your flame sensor did not work it s possible that the sensor is broken and that the furnace is operating as it should. If the filter is dirty replace it or clean it with soap and water if it s not disposable.

Remove this using the screwdriver. A burner with no flame may release gas into the air. The rheem manufacturing company produces a line of water heaters air conditioners and furnaces for both homes and businesses. First you will need a 1 4 inch hex screwdriver or even a wrench.

Step 1 turn off the power. However the furnace still shuts off after only a few seconds of the burners operating. I tried both cleaning my furnace s flame sensor and later installing a new flame sensor. How to clean a furnace flame sensor.

The furnace door can be opened easily and once opened you can access the internal part of the furnace. Just remove one sensor and replace it with a new sensor. When the sensor becomes blocked with debris the heater will not work properly. A flame sensor detects heat coming from the burners.

Get a small piece of sandpaper emery cloth or even steel wool as well as several pieces of clean paper towels.