it is the correct match

Can I manually override the spring return position

Key Benefits Modular Design: Facilitates easy field sensor replacement via a snap-in cartridge

Is this switch compatible with other Utica or Dunkirk series

preventing HVAC zone valve bypass and seat leakage

Lochinvar & A.O. Smith 100311038 Control Board R-22 it is the correct matchThe Lochinvar & A. O. Smith 100311038 Control Board is a critical OEM replacement part designed for high efficiency commercial boilers and water heaters. As a veteran grade communication control board, this unit serves as the central nervous system for Series FB equipment, facilitating high speed data transmission between burners, sensors, and the user interface. This specific module is the direct replacement for 100276779, ensuring a drop in fit for