the model 3754 maintains strict performance standards for mission-critical environmental control

visible swelling or cracking of the coil housing

the Bard 8603-006 valve is a critical piece of hardware

offering a compact footprint for tight installations where reliable liquid injection is critical for compressor protection and heat exchange efficiency

Lochinvar & A.O. Smith 100112614 Controller 319852-301 the model 3754 maintains strictThe Lochinvar & A. O. Smith 100112614 Combined Controller is the primary electronic control board managing combustion, temperature regulation, and safety protocols for BTH 400A Series 104 commercial water heaters. As a critical OEM replacement part, this integrated controller replaces legacy part number 9008219005, ensuring seamless BTH 400 104 compatibility. Designed specifically for natural gas water heaters, it monitors internal flow, pressure, and