OEM Carrier Defrost Control Board HK32EA003 for Model PH3GNA024000AB

This is the factory OEM defrost control board (part number HK32EA003) for the Carrier PH3GNA024000AB packaged heat pump unit. The defrost control board is the command center for your system's defrost sequence — it monitors outdoor coil temperature, manages timed defrost intervals, and signals the reversing valve and auxiliary heat to activate during the defrost cycle. When this board fails, symptoms include excessive ice buildup on the outdoor coil, a heat pump that never enters or exits defrost mode, short-cycling, or a complete loss of heating capacity during cold weather. Replacing the board with a genuine OEM part restores factory-programmed defrost logic and timing to your system.

• OEM Part Number: HK32EA003 | Board References: CEBD430433-08A, CEPL130433-01, CES0130076-00 | Designed for Carrier PH3GNA024000AB packaged heat pump systems
• OEM vs Generic: This is a genuine OEM board built to Carrier's exact factory specifications — including defrost timing intervals, anti-short-cycle delay (5 minutes), and quiet-shift logic that reduces noise during defrost transitions. Generic aftermarket boards may not replicate all factory-programmed parameters, potentially leading to premature compressor wear or improper defrost behavior.
• Install Difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage before opening the unit cabinet. Take photos of all wiring harness connections before removal. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Note all DIP switch settings on the old board and replicate them exactly on the new board before powering up.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for the Carrier PH3GNA024000AB packaged heat pump. Also cross-references Bryant and Payne models sharing the HK32EA003 / CES0130076-00 board specification. Always verify your existing board's part number against your unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork required.