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compatible with standard 1" blower shafts used in many Rheem and Ruud furnaces and air handlers
immediately halting the heating cycle to prevent hazardous conditions
this is a mechanical repair kit for the pressure vessel components
verifying the concave/convex blade orientation and hub placement is critical for compatibility
Lochinvar & A.O. Smith 100074348 PCB 318518-761 compatible with standard 1" blowerThe 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