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Where is the heat sensor?

What would make the red LED light blink 3 times?

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Can you elaborate on the what the code means on your schematics on furnace door. The heat/flame sensor is located next or near the burners. It looks like a metal rod where the tip is in direct contact with the flame. If it fails, it usually will not be able to keep a flame when the furnace starts.

Posted on Dec 05, 2008

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