the D4415 is an official OEM assembly

Its rugged gray steel case is designed for versatile wall or duct mounting in any orientation

Does the kit include the well or immersion sleeve

Integrated dual auxiliary switches provide remote feedback on damper blade position

this valve provides precise thermostatic control and integrated ignition supervision

Lennox 29M74 Limit Switch 322838-752 the D4415 is an officialThe Lennox 29M74 Limit Switch is a critical fixed temperature safety component engineered for Lennox furnace flame rollout and primary limit protection. This SPST (Single Pole Single Throw) thermal switch is rated for a 140F trip point with a 30F differential, ensuring precise furnace cycling and preventing heat exchanger damage. Designed as a direct OEM replacement limit switch, the 29M74 features a 1 inch insertion depth and 1 4 inch quick connect