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OEM Compatibility: Guaranteed fit for specific Lennox
Designed to verify inducer motor functionality and flue venting integrity
70" PF to meet strict combustion safety requirements for condensing gas furnaces
making it a standard choice for commercial water systems and large-scale irrigation applications
Lennox 33F37 Flame Sensor Els PW 17895 OEM Compatibility: Guaranteed fit forThe Lennox 33F37 Flame Sensor is a critical OEM replacement part engineered to maintain the safety and operational sequence of residential gas furnaces. As an HVAC flame rectification probe, it generates a microamp signal to the furnace control board upon detecting heat, ensuring the gas valve remains open only when a pilot or burner flame is present. This high integrity sensor is functionally identical to part 33F3701 and serves as a direct
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