this OEM Lennox replacement part is the primary successor for legacy models including LB-50709BB

and is rated for 100

it provides flexibility for various system requirements

this hardwired thermostat requires both the R (24 VAC) and C (Common) wires for operation

the 117-7114 is built to withstand rigorous commercial cycles

Lochinvar & A.O. Smith 100109972 Control Box 319825-402 this OEM Lennox replacement partThe Lochinvar & A. O. Smith 100109972 Control Box is a critical replacement component designed for precise sequence control and safety monitoring in high efficiency commercial boilers and water heaters. Engineered to interface seamlessly with the integrated control system, this module manages ignition timing, flame sensing, and temperature modulation. Technicians frequently utilize this OEM replacement part to resolve control board failure symptoms