OEM Carrier Defrost Control Board HK32EA005 for Model TCHC2550HECMRSH500

This is the genuine OEM Carrier defrost control board (part number HK32EA005), the factory-specified replacement for the Carrier TCHC2550HECMRSH500 heat pump system. The defrost control board manages the timing and execution of the defrost cycle, monitoring system parameters — including temperature and elapsed run time — to trigger defrost events that prevent ice accumulation on the outdoor evaporator coil. When this board fails, symptoms typically include continuous ice buildup on the outdoor unit, a system that never enters defrost mode, erratic defrost cycling, or a heat pump that locks out and stops heating altogether. Replacing the board with a genuine OEM unit restores factory-programmed defrost logic and system reliability.

• OEM Part Number: HK32EA005 | Also cross-references: CEPL130856-01-R, CEBD430856-06-RA | Carrier Factory Authorized Part
• OEM vs Generic: Genuine Carrier OEM boards use factory-calibrated defrost algorithms. Aftermarket boards often carry timing tolerances that can cause premature or delayed defrost events, accelerating compressor wear and reducing system efficiency ratings.
• Install Difficulty: 3/5 — Requires shutting down and locking out the heat pump before accessing the control panel. Tools needed: insulated screwdrivers, nut driver set, needle-nose pliers, phone camera (photograph all wiring before disconnecting). Label each connector before removal. If unsure, consult a licensed HVAC technician.
• Warranty & Shipping: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Engineered as a direct drop-in replacement for the Carrier TCHC2550HECMRSH500. Always verify your existing board's part number against HK32EA005 before ordering. Not sure if this is the right board? Our HVAC parts specialists verify fitment before you buy — contact us today and get your system back to peak performance fast.