OEM Carrier Defrost Control Board HK32EA005 for Model TCHC2550HECMRMH500

This is the genuine OEM Carrier defrost control board (part number HK32EA005), factory-specified for the Carrier TCHC2550HECMRMH500 heat pump system. The defrost control board manages the timing and execution of the defrost cycle, monitoring system parameters such as outdoor coil temperature and elapsed run time to determine when to initiate and terminate defrost. When this board fails, you'll typically see symptoms including persistent ice buildup on the outdoor coil, the system failing to enter defrost mode, erratic or continuous defrost cycling, or a complete system lockout with a fault code indicating a defrost control failure.

• OEM Part Number: HK32EA005 | Also referenced as CEPL130856-01-R and CEBD430856-06-RA | Factory-authorized Carrier replacement
• OEM vs Generic: This genuine Carrier OEM board is pre-programmed with factory defrost algorithms and timing logic matched to the TCHC2550HECMRMH500. Aftermarket boards may use generic timing parameters that degrade efficiency, cause premature compressor wear, or void remaining equipment warranties.
• Install Difficulty: 3/5 — Requires disconnecting 24V control wiring and line-voltage connectors. Tools needed: ¼" nut driver, needle-nose pliers, multimeter, and phone or camera to photograph all wire positions before removal. Always shut off power at the disconnect and verify with a multimeter before touching terminals. Refer to the unit's wiring diagram (located inside the access panel) during reinstallation.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct drop-in replacement for the Carrier TCHC2550HECMRMH500 heat pump. Verify your existing board's part number on the board label before ordering to confirm fitment — serial number ranges may apply. If you have any questions about compatibility, our HVAC parts specialists are available to confirm fitment before you buy. Order today and ship today — in stock and ready to go.