OEM Carrier Defrost Control Board HK32EA001 for Model PH4ANG018000BBAA

This is the genuine OEM factory-replacement defrost control board for the Carrier PH4ANG018000BBAA heat pump. The defrost control board manages the automatic defrost cycle — monitoring outdoor coil temperature and initiating timed defrost sequences to melt ice accumulation on the coil. When this board fails, symptoms typically include continuous frost or ice buildup on the outdoor unit, the system failing to switch between heating and cooling modes, or the heat pump running inefficiently due to a coil that never defrosts. A failed board may also cause the reversing valve to stick, preventing proper heat transfer in either direction.

• OEM Part Number: HK32EA001 | Also referenced as CEPL130524-01, CEBD420524-04A, CEBD430524-04B — all superseded by this board | 24V, 5A, Single-Phase
• OEM vs Generic: This genuine Carrier Factory Authorized Part ensures exact firmware timing sequences and relay ratings. Aftermarket boards may use incorrect defrost termination logic, causing premature or missed defrost cycles that accelerate compressor wear.
• Install Difficulty: 3/5 — Requires disconnecting 24V low-voltage control wiring harness and securing board to mounting bracket. Tools needed: #2 Phillips screwdriver, needle-nose pliers, smartphone camera (photograph all wiring before disconnecting), and a multimeter to confirm 24V input. Always shut off power at the disconnect before servicing.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered as a direct OEM replacement for the Carrier PH4ANG018000BBAA heat pump split system. Verify your unit's data plate matches part number HK32EA001 before ordering. Cross-references: CEPL130524-01, CEBD430524-04B. Not sure it fits? Our HVAC parts specialists verify fitment before every order — contact us and we'll confirm compatibility fast.