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International Comfort Products PGME24G0904 Flame Sensor
A flame sensor can only be found on furnaces that burn a gas. It is a safety sensor that senses the precise flame during ignition. For obvious reasons, if the flame sensor is triggered the whole HVAC system will remain stopped until the problem is fixed.
Some clues of a poorly performing furnace flame sensor
- The LP or natural gas has difficulty trying to begin an ignition sequence and the whole system shuts down
- The furnace will kind of run sporadically at the stroke of midnight after the second full moon following the second Sunday of the month
- The heat system will not begin operations and shuts down
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