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Lennox XP13-042 Flame Sensor
The flame sensor is a device that will sense the exact flame during ignition. As you could guess, if the flame sensor is triggered everything remains shut off until the main issue is remedied.
Subtle cues of a weak safety flame sensor
- Your furnace refuses to even begin to start and spits out an error code on the main board
- The gas has a tough time trying to ignite and the system throws an error code
- The furnace will operate intermittently but only on the third Wednesday of on months beginning on Thursday
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