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International Comfort Products PGME42G0904 Flame Sensor
The flame sensor can only be found on furnaces that burn a gas. It is a safety sensor that senses the acceptable flame in accordance with the initial ignition sequence. For obvious reasons, when the flame sensor gets triggered by something the whole HVAC system will remain stopped until the problem is fixed.
Major indications your furnace flame sensor will soon need to be replaced
- HVAC system turns on rarely when it wants to
- Your heating system will not produce any heat no matter what
- The gas entering the furnace has problems trying to begin an ignition sequence and the control shows an error
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