Lennox 33F37 Flame Sensor Els PW 17895 the 71491071 is the official

the 71491071 is the official successor to the 70005904 series

How should the switch be oriented during installation

This valve is typically rated for a Maximum Working Pressure (MWP) of 406 psig (28 bar)

Key Benefits: Universal Performance: Specifically calibrated for a 115-165F temperature range to provide accurate thermal protection

Key Benefits for Technicians: Direct OEM Replacement: Drop-in compatibility for the 42-25105-01

Lennox 33F37 Flame Sensor Els PW 17895 the 71491071 is the officialThe 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