or a total failure to engage during the heating cycle

allowing technicians to replace worn OEM mounts or convert motor applications without modifying the existing housing

Industrial Durability: Robust material construction resists wear from steam

allowing technicians to quickly land 14 or 16 AWG wiring on the internal lugs

Dual-Function Protection: Merges operating limit functionality with a fixed high limit for redundant system safety

Carrier HK02ZB309 Pressure Switch 322838-752 or a total failure toThe Carrier HK02ZB309 Pressure Switch is a critical OEM replacement part designed for high pressure monitoring in Carrier, Bryant, and Payne HVAC systems. This vapor pressure switch features precise factory set trip points, with an open pressure of 384 PSI and a close pressure of 309 PSI. Engineered for Puron (R 410A) units, it maintains system integrity by preventing hazardous overpressure events and ensuring the compressor operates within safe