OEM Carrier Defrost Control Board HK32EA001 for Model PH12NA01800GACAA

This is the genuine OEM Carrier defrost control board (part number HK32EA001), the factory-specified replacement for the Carrier PH12NA01800GACAA heat pump. The defrost control board monitors outdoor coil temperature and manages timed defrost cycles, signaling the reversing valve and outdoor fan to shed ice buildup from the coil. When this board fails, symptoms typically include the outdoor unit freezing solid, the system remaining locked in cooling mode during cold weather, erratic defrost cycling, or a complete failure to produce heat. Left unaddressed, a failed defrost board will cause compressor damage due to refrigerant slugging.

• Specs: 24V control voltage | Board model CEPL130524-01 | Cross-references: CEBD430524-06A, 151922 | Single-phase | Dimensions approx. 6" × 4" | Factory-matched to Carrier heat pump defrost logic
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP). OEM boards use exact firmware timing sequences and relay ratings matched to your unit. Aftermarket boards may use generic defrost timers that shorten or extend cycles incorrectly, accelerating compressor and coil wear.
• Install difficulty: 3/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone/camera for wiring documentation. Photograph all harness connections before removal. Board mounts with 4 screws inside the control panel. Always verify 24V at the board terminals after installation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH12NA01800GACAA heat pump. Also fits additional Carrier, Bryant, and Payne heat pump models that reference part number HK32EA001 — verify your unit's data plate and existing board part number before ordering. Our fitment specialists are available to confirm compatibility before you buy.