OEM Carrier Defrost Control Board HK32EA008 for Model PH4GEAA36000AA

This is the genuine OEM Carrier defrost control board (part number HK32EA008), the factory-specified replacement for the Carrier PH4GEAA36000AA heat pump system. The defrost control board manages the critical defrost cycle by monitoring outdoor coil temperature sensors and automatically switching the system between normal heating mode and defrost mode to prevent frost and ice buildup on the outdoor coil. When this board fails, symptoms typically include a heavily iced outdoor coil, the system running in a continuous defrost loop, a locked-out unit that delivers no heat, or erratic cycling behavior during cold weather operation.

• OEM Part Number: HK32EA008 | Replaces HK32EA003, CEPL130433-01, CEBD430433-08A, CEBD430433-09A | Factory-authorized Carrier replacement part
• Key Features: Selectable defrost intervals of 30, 60, 90, and 120 minutes | Quiet Shift Technology for reduced noise during defrost transitions | Optional random start timer to stagger defrost cycles | Speedup jumper for fast field testing and diagnostics
• Install Difficulty: 3/5 — Disconnect power at the breaker before opening the unit. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, camera or phone to photograph wiring before disconnecting. Take note of all jumper settings on the original board before removal.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.

Compatibility: Engineered for the Carrier PH4GEAA36000AA heat pump and fits across the broader Carrier, Bryant, and Payne heat pump product families that share this board. Always verify your existing part number against the unit's wiring diagram and data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you purchase — contact us and we'll confirm.