Most units come with the set screw pre-installed in the hub

Simplified Installation: Comes as a complete kit with pre-wired controls and mounting hardware to reduce labor time on the job site

ensuring a drop-in fit for rapid service restoration

This kit is optimized for hydronic water systems

Lennox 22K52 Ignition Control 321894-708 Most units come with theThe Lennox 22K52 Ignition Control is a critical OEM replacement part engineered for precise furnace sequencing and burner supervision. As the direct successor to the Lennox 15T95 ignition board, this integrated control module manages the gas valve, inducer motor, and igniter timing to ensure safe combustion cycles. For technicians troubleshooting Lennox furnace ignition failure, this board provides the exact electrical footprints and terminal