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Lennox XP19-024 Flame Sensor
The flame sensor is one of the safety features that will reliable sense the precise flame in accordance with the initial ignition sequence. As you would probably could have guessed, when the flame sensor gets triggered by something the entire HVAC system will stop until the main issue is remedied.
Clues to watch for to know your furnace flame sensor will soon need to be replaced
- The entire heating system runs intermittently when it feels like it
- The furnace will not produce any heat whatsoever
- LP or natural gas will not begin igniting no matter what you do
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