OEM Carrier Defrost Control Board HK32EA003 for Model PH3GEAA36000AA

This OEM defrost control board (part number HK32EA003) is the factory-specified replacement for the Carrier PH3GEAA36000AA packaged heat pump. The defrost board manages the timing and logic of defrost cycles, periodically reversing the refrigerant circuit to melt frost accumulation off the outdoor coil. When it fails, symptoms include continuous or absent defrost operation, heavy ice buildup on the outdoor unit, loss of heating capacity, or a system that locks out entirely during cold weather operation.

• Specs: Operating voltage: 18–30 VAC | Defrost duration: 10 minutes maximum | Selectable time intervals: 30 / 60 / 90 / 120 minutes | Board cross-references: CEBD430433-08A, CEPL130433-01, CESO130076-00
• OEM vs Generic: This OEM board is factory-programmed to Carrier's exact defrost timing parameters for the PH3GEAA36000AA. Aftermarket boards may use generic interval settings that can result in incomplete defrost cycles, increased compressor wear, or nuisance lockouts over time.
• Install difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage before handling. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone/camera for wiring documentation. Photograph all terminal connections before removing the old board. Match terminal labels exactly on reinstallation.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered by 3PM local time.

Compatibility: Designed for the Carrier PH3GEAA36000AA packaged heat pump. Cross-references OEM part numbers CEBD430433-08A and CEPL130433-01. Note: HK32EA003 has been superseded by HK32EA008 — both part numbers are stocked and either is an accepted factory replacement. Verify your existing board's part number before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order.