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Flame rectifier not sure where to look for the flame rectifier, is it inside or outside the unit. not sure where to look to check it.

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  • mopar440man May 11, 2010

    what kind of unit do you have & M# & S#

  • Ken Bledsoe May 11, 2010

    It is inside the flame box if you can look for a small bracket with two wires coming off it. If is inside looking for a flame. If you have a wiring diagram look for flame rectifier or something called a Cad Cell all they do is sense flame is present and it is okay to leave the circuit open to continue to heat. Your Cad Cell could be bad but they get dirty depending on the burner quality.

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Flame rectification is referring to a flame sensor. The flame sensor can be located on a gas furnace in front of the burners. It will have one wire connected to it. It is located at the opposite end of the burners away from the hot surface ignitor which has two wires connected to it. These wires will be found under the burners. I hope this answers your question.
Good luck

Posted on Apr 03, 2009

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