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International Comfort Products GDJ050M12A1 Flame Sensor
The flame sensor is a vital part that senses the exact flame while the system is starting. As expected, when the flame sensor is activated the whole system stops until the problem is dealt with.
Important clues of a weak flame sensor
- The entire heating system starts sporadically at midnight, but only after the new moon following the fourth Monday of the month
- Your gas furnace refuses to work when you crank the thermostat up
- The gas that has entered the furnace will not even try to begin an ignition sequence and closes the gas valve
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