and DR4500 platforms for pen arm positioning and drive functions

or if there is no continuity across the terminals when the switch is cool

26K Ohm Sensitivity: Optimized for municipal water and typical HVACR condensate

Multi-Speed Versatility: The 4-speed design provides flexibility for cooling

Carrier HK32EA009 Control Board 322057-301 and DR4500 platforms for penThe Carrier HK32EA009 Defrost Control Board is a critical OEM replacement engineered for precise management of defrost cycles in Carrier, Bryant, and Payne heat pump systems. This solid state control board monitors the outdoor coil temperature via the defrost thermostat and calculates compressor run time to initiate defrost only when necessary, preventing inefficient ice buildup. Designed for 24V control circuits, the HK32EA009 features field