Loud operation often indicates a bent F125 fan blade or an loose set screw

Dual-Stage Control: Manages 2-stage heating operations for improved temperature precision and efficiency

this unit offers a reliable solution for restoring factory-spec performance

making it an essential OEM HVAC replacement part for technicians focused on system uptime and thermal protection

and catastrophic hydraulic shock

Lochinvar & A.O. Smith 100167772 Control Module 320788-703 Loud operation often indicates aThe Lochinvar & A. O. Smith 100167772 Control Module is a critical OEM replacement part engineered for high efficiency commercial water heaters and hydronic boiler systems. As a primary digital controller, this module manages the ignition sequence, gas valve modulation, and flame supervision to ensure peak thermal efficiency and operational safety. Designed to interface with the SMART TOUCH and CONXUS platforms, the 100167772 provides consistent