Lochinvar & A.O. Smith 100167799 Control Board 30067439-890 Solenoid coils are designed to

Solenoid coils are designed to match the specific magnetic circuit and plunger diameter of the valve stem

Broad Chemical Compatibility: Fully compatible with HFC refrigerants and existing POE-based systems for simplified retrofitting

Universal SPDT Switching: Supports both make-on-rise and break-on-rise applications

600 psi body pressure rating provides a high safety margin for high-rise and industrial hydronic loops

Lochinvar & A.O. Smith 100167799 Control Board 30067439-890 Solenoid coils are designed toAs a veteran tech, you know that a glitchy boiler often traces back to the primary logic center. The Lochinvar & A. O. Smith 100167799 Control Board is the definitive OEM replacement part for high efficiency hydronic systems. This integrated control board is a direct, drop in successor to the discontinued RLY30043, ensuring 100% circuit board compatibility without requiring harness modifications. Engineered specifically for the Lochinvar Knight