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Lennox G40DF-36A-070X Flame Sensor
A flame sensor is only found on gas furnaces. It is a sensor that can sense the precise flame during ignition. Due to safety concerns, if the flame sensor is triggered everything stops until the problem is dealt with.
Clues your flame sensor will need to be replaced
- The propane or natural gas cannot begin igniting and shuts itself off
- Your furnace refuses to work when you have it set to
- System will run sporadically when the time is right
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