OEM Carrier Defrost Control Board HK32EA001 for Model PH3ANA036000BBAA

This is the genuine OEM Carrier defrost control board (part number HK32EA001), the factory-specified replacement for the Carrier PH3ANA036000BBAA heat pump. The defrost control board continuously monitors outdoor coil conditions and initiates the defrost cycle when frost accumulation is detected, reversing the refrigerant flow to melt ice buildup on the outdoor coil before returning the system to heating mode. When this board fails, the result is typically a coil encased in ice, sharply reduced heating capacity, or a system that never exits defrost mode — leaving your home cold and your compressor at risk of damage.

• Specs: 24V control circuit | Adjustable defrost initiation intervals (30 / 60 / 90 minutes) | Replaces cross-reference part numbers CEPL130524-01, CEBD430524-06A, 1173636, and 1177927 | Direct plug-in connector design — no rewiring required
• OEM vs Generic: This factory-original board is manufactured to exact Carrier tolerances, ensuring precise defrost timing and reliable reversing valve switching. Generic aftermarket boards frequently run off-cycle intervals, leading to premature compressor wear, inefficient heat transfer, and repeat failures.
• Install Difficulty: 3/5 — Disconnect power to the unit before beginning. Photograph all wiring harness connections prior to removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter for post-install verification. It is strongly recommended to inspect the defrost thermostat and outdoor temperature sensor before replacing the board to confirm the board is the root cause of failure.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Factory-matched for Carrier model PH3ANA036000BBAA heat pump systems. Also compatible with a wide range of Carrier, Bryant, and Payne heat pump platforms sharing the HK32EA001 specification — verify your unit's data plate and existing board part number before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy. Order today and get same-day shipping.