Semi-hermetic compressors like this A-1 unit are bolted together rather than welded

The heavy-duty brass construction and internal slide assembly are built to withstand the pressure seating requirements of R-410A systems

The 959 is the current production standard and a direct functional equivalent to the 901

How do I verify if this fits my specific water heater or boiler model

Nordyne 622338 Transformer 323055-751 Semi-hermetic compressors like this A-1The Nordyne 622338 Transformer is a heavy duty step down transformer engineered to convert 240V AC primary input to a stable 24V AC secondary output. Rated at 30VA, this OEM component is a staple for residential and commercial HVAC service, providing the necessary low voltage power for integrated furnace control boards, 24V thermostats, and ignition systems. As a veteran technician knows, a 30VA power rating is the sweet spot for many furnace repair