OEM Carrier Defrost Control Board HK32EA001 for Heat Pump Model PH12NA04200GABAA

This is the genuine OEM Carrier defrost control board (part number HK32EA001), factory-specified for the Carrier PH12NA04200GABAA heat pump. The defrost control board monitors outdoor coil temperature and elapsed run time, then initiates and terminates defrost cycles to prevent ice buildup on the outdoor unit. When this board fails, common symptoms include the heat pump staying locked in cooling mode during winter, failing to enter defrost at all, or conversely running continuous defrost cycles that leave the system unable to heat. If your unit is blowing cold air in heat mode or the outdoor coil is heavily iced over, this board is the most likely culprit.

• Part Number & Specs: OEM Part # HK32EA001 | Also cross-references CEPL130524-01, CEBD430524-06A | 24V control circuit | 5A rated | Single-phase | 6" × 4" board form factor
• OEM vs Generic: The genuine OEM HK32EA001 is manufactured to Carrier's exact factory tolerances, ensuring precise defrost timing intervals and accurate coil-temperature thresholds. Aftermarket alternatives often use off-spec relays and timers that can cause premature re-icing or compressor short-cycling, shortening system life.
• Install Difficulty: 3/5 — Requires disconnecting 24V control wiring harness and low-voltage connectors. Always shut off power at the disconnect and breaker before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera to photograph all wiring before removal. Label every wire lead prior to disconnecting. Average install time: 30–45 minutes for a qualified technician.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In stock and ships same business day from our warehouse.

Compatibility: Designed as the factory-direct replacement for the Carrier PH12NA04200GABAA heat pump split system. Also fits select 38YCG and related Carrier/Bryant heat pump platforms sharing the HK32EA001 board specification — always verify your unit's wiring diagram and existing board part number before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.