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International Comfort Products NTC5100BFE1 Flame Sensor
A flame sensor is a safety device that senses the proper flame while the system is starting. Because of the safety issues involved, when the sensor is triggered by an event the furnace will not start for as long as the problem remains.
General warnings to watch for in a bad primary flame sensor
- The gas will not even try to properly ignite and the whole system shuts down
- The furnace refuses to generate heat and shuts down
- The whole system will sort of operate sporadically at the stroke of midnight after the second full moon following the second Sunday of the month
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