Lochinvar & A.O. Smith 100304118 Control Refrigerant refer to your unit's wiring

refer to your unit's wiring diagram to verify capacitor requirements for your specific production year

This blade features a 1/2-inch bore

this model is the damper unit only

this brass solenoid valve delivers the longevity and FKM seal chemical resistance required for professional-grade systems

If the existing scroll is cracked or warped

Lochinvar & A.O. Smith 100304118 Control Refrigerant refer to your unit's wiringThe Lochinvar 100304118 User Interface Control Board is a critical OEM replacement component engineered for precise communication between the technician and the boilers central processing unit. As a genuine Lochinvar boiler part, this interface allows for real time monitoring of HVAC parameters, sensor feedback, and modulation rates. Designed to integrate seamlessly with the SMART SYSTEM control architecture found in Knight, Cadet, and Armor series