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Whirlpool ATR0953SPP0 Flame Sensor
The flame sensor can only be found on furnaces that burn a gas. It is a safety sensor that will sense the acceptable flame while the system is starting. As you could guess, if the flame sensor senses a problem the whole HVAC system will remain stopped until obstacle is corrected.
Key clues of an ailing safety flame sensor
- The gas that has entered the furnace has problems trying to begin an ignition sequence and closes the gas valve
- The gas furnace refuses to produce any heat when the control board tells it to
- The furnace will kind of run sometimes at midnight, but only after the new moon following the fourth Monday of the month
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