How to Change the Flame Sensor on My Comfortmaker Furnace

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Comfortmaker makes lines of gas furnaces. Because these furnaces are powered by gas, safeguards are needed. For example, if you were turn on your furnace without a pilot flame, the furnace would fill the room with gas. To prevent this, a sensor is located next to the pilot. The sole purpose of this component is to detect a pilot light. If the sensor is broken, you can replace it yourself.

Things You'll Need

  • Phillips screwdriver
  • Find the main breaker panel in your home and flip the breaker that controls the Comfortmaker furnace circuit to the "Off" position.

  • Remove the screws on the front panel of your Comfortmaker furnace.

  • Remove the front panel of the furnace. You can now access the heat sensor, which is mounted next to the pilot light. The heat sensor is a metal rod a few inches in length with wiring plugged into it at the base.

  • Unplug the wiring from the base of the heat sensor.

  • Remove the screw holding the sensor in place and remove the sensor.

  • Fit a new sensor in the furnace and replace the wiring and screw.

  • Replace the front panel of the Comfortmaker furnace.

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