OEM Carrier Defrost Control Board HK32EA001 for Model PH13NR042000AEAA

This is the genuine OEM factory-replacement defrost control board (part number HK32EA001) for the Carrier PH13NR042000AEAA heat pump. The defrost control board manages the timing and execution of defrost cycles — periodically reversing refrigerant flow to melt accumulated ice off the outdoor coil. When this board fails, the outdoor unit may ice over completely, the system may run continuously in heating mode with no relief, or the unit may trip into a hard fault or lockout condition. In cold-weather climates, a failed defrost board can render a heat pump entirely inoperable within hours.

• Specs: OEM Part # HK32EA001 | Also cross-references CEPL130524-01, CEBD430524-06A | 24V control voltage | 5A | Single-phase | Board dimensions approx. 6" × 4"
• OEM vs Generic: This is the genuine Carrier Factory Authorized Part — not an aftermarket substitute. OEM boards are factory-programmed with exact defrost timing algorithms and relay ratings matched to your PH13NR042000AEAA unit. Aftermarket boards risk incorrect defrost intervals, premature relay failure, and voided equipment warranties.
• Install Difficulty: 3/5 — Disconnect all power at the breaker before servicing. Tools required: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers, and a multimeter to verify 24V control signal. Photograph all wiring harness connections before removal. Transfer defrost timing jumpers from the old board to the new board exactly as found.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed for the Carrier PH13NR042000AEAA split-system heat pump (3.5-ton, R-410A). Also fits additional Carrier, Bryant, and Payne heat pump models — verify your unit's data plate and existing board part number before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase. Order today and get back to comfort fast.