OEM Carrier Defrost Control Board HK32EA001 for Model PH12NA018000ACAA

This genuine OEM defrost control board (part number HK32EA001) is the factory-specified replacement for the Carrier PH12NA018000ACAA heat pump. The defrost control board manages and times the system's defrost cycles, receiving signals from outdoor coil sensors and the thermostat to determine when the unit must enter defrost mode to clear ice buildup from the outdoor coil. When this board fails, the heat pump will remain stuck in a frost-covered state, unable to transfer heat efficiently — leading to reduced heating output, continuous icing of the outdoor coil, system lockout faults, or the unit short-cycling without completing a proper defrost cycle.

• Specs: 24V control voltage | Board model CEPL130524-01 | Cross-references: 151922, CEBD430524-06A | Single-phase | Dimensions approx. 6" × 4" | Direct drop-in OEM replacement
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP), manufactured to exact factory tolerances. Generic or aftermarket boards may use off-spec relay ratings and timing circuits that cause premature re-icing, nuisance lockouts, or shortened compressor life.
• Install difficulty: 3/5 — Disconnect power and verify capacitors are discharged before handling. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness connections before removal. Transfer one connector at a time to avoid miswiring.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed to fit the Carrier PH12NA018000ACAA heat pump and other compatible Carrier, Bryant, and Payne heat pump models using the HK32EA001 board. Always verify your existing board's part number against your unit's wiring diagram or data plate before ordering. Our fitment specialists are available to confirm compatibility before you buy — just reach out before placing your order.