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preventing the operation of the gas valve if flue gas venting is obstructed or the inducer blower fails
ensuring stability in unconditioned mechanical spaces
long-term monitoring solution with no moving parts to fail in high-vibration environments
Precision Safety: High-sensitivity vent safety switch detects flue blockages to prevent CO poisoning
Lennox 12F19 Flame Sensor preventing the operation of theThe Lennox 12F19 Flame Sensor is a critical safety component designed for precise flame rectify detection in residential and commercial gas fired heating systems. This genuine OEM part is engineered to monitor the burner's pilot or main flame, sending a continuous microamp signal to the furnace control board. If the 12F1901 furnace sensor fails to detect a flame, it immediately signals the gas valve to shut down, preventing hazardous gas accumulation.
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