OEM Carrier Defrost Control Board HK32EA001 for Model PH12NA02400GABAA

This is the genuine OEM Carrier defrost control board (part number HK32EA001), factory-specified for the Carrier PH12NA02400GABAA heat pump. The defrost control board governs the timing and initiation of defrost cycles, sending commands to the reversing valve and outdoor fan to shed ice buildup from the coil during heating operation. When this board fails, the heat pump may remain locked in cooling mode, fail to initiate a defrost cycle entirely, or exhibit short-cycling and frost accumulation on the outdoor unit — all of which severely degrade heating efficiency and can lead to compressor damage if left unaddressed.

• Specs: 24V control circuit | Board model CEPL130524-01 | Compatible relay: Potter & Brumfield T9AS2D22-24 | Single-phase | OEM cross-references: CEBD430524-06A, 151922
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part. OEM boards are factory-calibrated to the exact defrost timing intervals and sensor thresholds specified for your unit. Aftermarket substitutes may use incorrect defrost intervals, causing premature compressor wear or coil icing.
• 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 or camera to photograph all wiring harness connections prior to removal. Transfer wiring harnesses one at a time to avoid miswiring.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH12NA02400GABAA heat pump. Also fits select Carrier, Bryant, and Payne heat pump models that specify OEM part number HK32EA001 — verify your unit's data plate and existing board part number before ordering. Our fitment team is available to confirm compatibility before you buy.