The Carrier HK42FZ020 Control Board is a critical OEM replacement part designed for two-stage gas furnace systems

Rugged Construction: Designed to withstand the high-temperature environments typical of commercial water heater enclosures

but those components are typically separate field-replaceable parts

System Compatibility: Direct OEM cross-reference for Bard 8552-004

"How to troubleshoot BASO H91AA-6 gas valve not opening

Baldor Motor VEJMM3154T Motor 318973-401 The Carrier HK42FZ020 Control BoardThe Baldor Reliance VEJMM3154T is a high performance 1. 5 HP jet pump motor engineered for demanding industrial and commercial HVACR applications. Operating at a 1755 RPM base speed, this three phase, NEMA 143JM frame motor utilizes a TEFC (Totally Enclosed Fan Cooled) enclosure to prevent internal contamination in harsh environments. Designed for 230 460V configurations at 60Hz, it features a premium efficient design that minimizes energy consumption