Lochinvar & A.O. Smith 100074348 PCB 318518-761 verifying the differential pressure with

verifying the differential pressure with a manometer is recommended before replacing the high-limit safety switch

The compact 9-inch steel housing is designed to withstand extreme operating temperatures while effectively trapping copper shavings and system debris

Can I use this to replace a different brand of 50A contactor

often displaying a flash code for "pressure switch stuck open

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

Lochinvar & A.O. Smith 100074348 PCB 318518-761 verifying the differential pressure withThe 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