OEM Carrier Defrost Control Board HK32EA003 for Model PH3GPAA30000AA

This OEM defrost control board (part number HK32EA003) is the factory-specified replacement for the Carrier PH3GPAA30000AA packaged heat pump. The defrost control board governs the timing and logic of defrost cycles, periodically reversing the refrigerant flow to melt frost accumulation off the outdoor coil. When this board fails, the outdoor coil will ice over completely, heating efficiency will plummet, and the system may lock out entirely — leaving your customers without heat in the coldest months. Common symptoms include a fully frozen outdoor coil, the unit running in continuous defrost, or a system that never enters defrost at all.

• Specs: 18–30 VAC input | 50/60 Hz | Adjustable defrost time intervals (30/60/90/120 min) | Max defrost sequence: 10 minutes | Compatible with CEBD430433 and CEPL130433-01 board families | Cross-references: HK32EA008, CES0130076-00, CEPL130433-01, CEBD430433-08A
• OEM vs Generic: The OEM board is factory-matched to the PH3GPAA30000AA's defrost logic and timing parameters. Generic aftermarket boards may introduce timing drift or signal noise during defrost transitions, risking compressor short-cycling and premature wear.
• Install difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage before touching any terminals. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, multimeter, and a camera or phone to photograph all wiring connections before removal. The board mounts in the control compartment of the packaged unit; swap connectors one at a time for accuracy.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PH3GPAA30000AA packaged heat pump and other Carrier, Bryant, and Payne models originally equipped with the CESO130076-00 or CEPL130433-01 defrost board. Always verify your existing board's part number against your unit's data plate before ordering. Not sure? Our HVAC parts specialists confirm fitment before you buy — just reach out.