This specific rack is engineered for the RX-400

the M0081904R utilizes a permanent magnet rotor to provide superior torque and energy savings over traditional PSC motors

Streamlined Repair: Consolidates critical ignition components into a single part number to reduce diagnostic and procurement time

Simplified 2-Wire Installation: Utilizes a basic two-wire connection to the unit controller

It is chemically identical to and directly replaces model variations MA-5210-0-0-2

Lochinvar & A.O. Smith 100074348 PCB Els PW 29614 This specific rack is engineeredThe 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