OEM Carrier Defrost Control Board HK32EA003 for Model PH3GNA048000AB

This is the factory OEM defrost control board (part number HK32EA003) engineered as the direct replacement for the Carrier PH3GNA048000AB packaged heat pump. The defrost board is the command center for your outdoor coil's freeze-protection cycle — it monitors outdoor temperature and coil sensors, triggers timed defrost sequences, and coordinates the reversing valve and compressor to shed ice buildup. When this board fails, your heat pump may run continuously in ice-over conditions, refuse to enter defrost mode, or lock out entirely with no heat output — especially in temperatures below 35°F.

• OEM Part Number: HK32EA003 | Also cross-references: CEBD430433-08A, CEPL130433-01, CES0130076-00 | Superseded by HK32EA008 on newer builds — verify your unit's data plate before ordering.
• Key Specs: Input voltage 18–30 VAC | 50/60 Hz | Defrost cycle duration up to 10 minutes | Selectable time intervals: 30 / 60 / 90 / 120 minutes | 5-minute anti-short-cycle delay | Power consumption 1 W maximum
• OEM vs Generic: This OEM board uses factory-matched PCB logic, original connector positions, and verified timing algorithms for the PH3GNA048000AB platform. Aftermarket boards may use approximated timing intervals that can cause premature or insufficient defrost cycles, leading to compressor stress and reduced system efficiency.
• Install Difficulty: 3/5 — Requires shutting down the unit and confirming zero voltage before board removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone camera (photograph all wiring before disconnecting). Label each connector before removal. A licensed HVAC technician is recommended for this repair.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse.

Compatibility Note: Designed for use in the Carrier PH3GNA048000AB packaged heat pump (4-ton, R-410A). Also fits select Carrier, Bryant, and Payne heat pump models that originally used the CESO130076-00 or HK32EA003 defrost board. Always verify the existing part number on your old board before ordering. Our team is available to confirm fitment — contact us before you buy if you have any questions. In stock and ships today.