How To Clean Your Furnace Flame Sensor

A furnace flame sensor works by detecting the presence of a flame within the furnace.

How to clean your furnace flame sensor.

The sensor is a short length of thin metallic rod that creates a small current of electricity in order to confirm there is fire burning within the furnace. To do that you can follow these same instructions except that no sanding is involved. Remove this using the screwdriver. If your furnace seems to shut down on its own and no longer works as efficiently chances are your flame sensor needs to be cleaned.

How a furnace flame sensor works. Ideally you want to call a professional hvac cleaner to clean your flame sensor. First turn off the furnace and then use the screwdriver to open the furnace door. 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.

Just remove one sensor and replace it with a new sensor. This is an eas. The flame sensor is one of the most delicate parts of the furnace and has to be handled with care. The furnace door can be opened easily and once opened you can access the internal part of the furnace.

You may need to replace it. The flame sensor is a thin metallic rod attached with a single screw below the burner. Replacing a broken flame sensor. If cleaning your flame sensor did not work it s possible that the sensor is broken not dirty.

Just clean the flame sensor and your furnace will stay on. Step 1 remove the flame sensor.