Fully compatible with McDonnell & Miller 750 series and LPC-2000 liquid level controllers

identical replacement for the C-309-S-T-HH

Durable Construction: Built to withstand the environmental demands of plaster and masonry work without warping or corroding

it provides flexibility for various system requirements

Lochinvar & A.O. Smith 100109972 Control Box 319825-402 Fully compatible with McDonnell &The 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