OEM Carrier Defrost Control Board HK32EA003 for Model PH3GPAA42000AA

This OEM defrost control board (part number HK32EA003) is the factory-specified replacement for the Carrier PH3GPAA42000AA packaged heat pump system. The defrost control board manages all defrost cycle timing and logic — monitoring outdoor coil temperature and runtime to determine when the system must enter defrost mode. When this board fails, you may notice the outdoor coil freezing solid, the unit locking out on a defrost fault, the system producing no heat in cold weather, or erratic short-cycling between heating and defrost modes. Replacing this board restores proper defrost sequencing and protects the compressor from damage caused by ice buildup.

• Part Specs: OEM Part No. HK32EA003 | Board No. CEPL130433-01 | 24V control circuit | Compatible cross-references: CES0130076-00, CEBD430433-08A | Direct factory replacement for Carrier PH3GPAA42000AA packaged heat pump
• OEM vs Generic: This is the OEM factory-matched board, calibrated to the exact defrost timing intervals and sensor thresholds specified for your unit. Generic aftermarket boards may use approximate timing logic that leads to premature defrost cycling or insufficient coil clearing — shortening compressor life and reducing efficiency.
• Install Difficulty: 3/5 — Shut off all power at the breaker and disconnect the unit before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a phone or camera (photograph all wiring before disconnecting). Transfer one wire at a time to avoid miswiring. Note: HK32EA003 has been superseded; confirm your replacement part number matches your unit's board layout before installation.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH3GPAA42000AA packaged heat pump unit. Also cross-references CES0130076-00 and CEPL130433-01 board numbers. Verify your existing board's part number and connector layout before ordering to ensure a direct fit. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us today and get your system back online fast.