Lochinvar & A.O. Smith 100189283 Control R-407A this housing ensures a precise

this housing ensures a precise seal for the inducer motor and impeller wheel

The 3PNO (3 Pole Normally Open) configuration allows for simultaneous switching of three line-voltage legs

Built as a reliable digital upgrade for legacy electromechanical thermostats

or performing an annual service on rear access doors and cleanout plates

preventing thermal shock and short-cycling

Lochinvar & A.O. Smith 100189283 Control R-407A this housing ensures a preciseThe Lochinvar & A. O. Smith 100189283 Control (Integrated FTX725) is a critical OEM boiler control board designed for high efficiency commercial hydronic systems. This integrated furnace control manages critical combustion sequences, including the hot surface igniter timing, blower speeds, and gas valve modulation. Engineered specifically for the Lochinvar Knight and high output A. O. Smith series, it serves as a direct replacement for legacy part