OEM Carrier Defrost Control Board HK32EA001 for Model PH12NA03600GACAA

This is the genuine OEM Carrier defrost control board (part number HK32EA001), the factory-specified replacement for the Carrier PH12NA03600GACAA heat pump. The defrost control board monitors outdoor coil temperature and elapsed run time, then initiates and terminates timed defrost cycles to prevent frost and ice accumulation on the heat pump's evaporator coil. When this board fails, the outdoor unit will ice over completely, the system will lose heating capacity, or the heat pump may short-cycle — all signs that point directly to a faulty defrost board before any other component is suspect.

• Specs: OEM Part # HK32EA001 | Also cross-references CEPL130524-01, CEBD430524-06A, 1173636, 1177927 | Adjustable defrost timing (30/60/90 min) | Factory-matched relay ratings | 24V control circuit compatible
• OEM vs Generic: Genuine Carrier OEM boards are manufactured to exact factory tolerances and use the original relay grades and microcontroller firmware. Aftermarket boards may lack precision timing calibration, which can cause premature or missed defrost cycles — accelerating compressor and coil wear over time.
• Install difficulty: 3/5 — Shut off power at the disconnect before opening the control panel. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a multimeter, and zip ties for wire management. Photograph all wiring harness connections before disconnecting. Note the defrost timing jumper position on the old board and replicate it on the new board.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before the cutoff.

Compatibility: Designed for the Carrier PH12NA03600GACAA heat pump. Also compatible with select Carrier, Bryant, and Payne heat pump models sharing the HK32EA001 specification — verify your model's data plate and wiring diagram before ordering. Cross-reference part numbers include CEPL130524-01, CEBD430524-06A, 1173636, and 1177927. In stock and ready to ship today — get your heat pump out of lockout fast.