Lochinvar & A.O. Smith 100074348 PCB 318518-761 this is a mechanical repair

this is a mechanical repair kit for the pressure vessel components

Manual override lever: Allows for manual opening during system filling or maintenance (NC models only)

compatible with standard 1" blower shafts used in many Rheem and Ruud furnaces and air handlers

Key Benefits for Technicians OEM Precision: Genuine Reznor 201160 part ensures exact calibration for high altitude HVAC applications

immediately halting the heating cycle to prevent hazardous conditions

Lochinvar & A.O. Smith 100074348 PCB 318518-761 this is a mechanical repairThe Lochinvar & A. O. Smith 100074348 PCB is a critical OEM replacement control board designed for high efficiency tankless water heaters and select boiler models. Specifically engineered for 66J IN and 66J OS series units, this printed circuit board acts as the central intelligence for the system, regulating the ignition sequence, monitoring flame rectification, and processing data from integrated safety sensors. To ensure peak energy efficiency and