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Carrier KFCEH1801F20 Flame Sensor
A flame sensor can only be found on furnaces that burn a gas. It is a safety sensor that will reliable sense the precise flame during the initial ignition of the furnace. Due to safety concerns, if the flame sensor is triggered the furnace will not start until the problem is fixed.
Indications of a defective safety flame sensor
- The gas that has entered the furnace has difficulty trying to begin an ignition sequence and shuts off
- System starts infrequently when it feels like it
- The furnace is unable to produce heat when it is supposed to
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