OEM Carrier Defrost Control Board HK32EA008 for Model PH4GNAA30000AA

This is the genuine OEM defrost control board (part number HK32EA008), the factory-specified replacement for the Carrier PH4GNAA30000AA heat pump. The defrost board monitors outdoor coil temperature sensors and orchestrates timed transitions between heating and defrost modes to prevent damaging frost and ice accumulation on the outdoor coil. When this board fails, common symptoms include a coil that remains permanently iced over, a heat pump that never enters a defrost cycle, erratic defrost timing, or a system that locks out on fault codes related to defrost operation.

• Specs: OEM part HK32EA008 | Replaces HK32EA003 | Board ID: CEPL130433-02 / CEBD430433-09A | Selectable defrost intervals: 30, 60, 90, and 120 minutes | 24V control circuit compatible
• OEM vs Generic: OEM boards are manufactured by Carrier to exact factory specifications for guaranteed compatibility and reliability. Generic or third-party boards may lack precise defrost timing calibration, risking coil damage, reduced efficiency, and shortened compressor life.
• Install Difficulty: 3/5 — Disconnect and lock out power before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera for wiring documentation. Label all low-voltage wires before disconnecting. A speedup jumper on this board allows for accelerated defrost testing post-install to confirm proper operation.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PH4GNAA30000AA heat pump. Also cross-references Bryant and Payne models using the HK32EA003 or HK32EA008 board. Always verify your existing board's part number against the data plate inside the unit before ordering. Our fitment specialists are available to confirm compatibility before you buy.