OEM Carrier Defrost Control Board HK32EA001 for Model PH15NB01800GBAAA

This is the genuine OEM defrost control board (part number HK32EA001), the factory-specified replacement for the Carrier PH15NB01800GBAAA heat pump. The defrost control board monitors outdoor coil conditions and governs the timing and execution of defrost cycles — periodically reversing refrigerant flow to melt ice buildup on the outdoor coil. When this board fails, the heat pump may remain locked in a constant frost or ice condition, fail to initiate defrost cycles entirely, or short-cycle with fault codes. In heating mode, a failed defrost board typically results in a heavily iced outdoor coil, sharply reduced heating capacity, and eventual compressor damage if left unaddressed.

• Specs: OEM Part # HK32EA001 | Board ID: CEPL130524-01 | Control voltage: 24V | Single-phase | Compatible board dimensions: approx. 6" × 4" | Also cross-references: CEBD430524-06A, 151922
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part. OEM boards are programmed with exact defrost timing logic and relay ratings for your unit. Aftermarket boards frequently use non-matched relay specs and timing parameters that cause premature failure or erratic defrost behavior.
• Install difficulty: 3/5 — Requires disconnecting 24V control wiring, outdoor sensor leads, and relay harnesses. Always shut off power at both the indoor air handler and outdoor disconnect before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wire connections before removal. No soldering required.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PH15NB01800GBAAA heat pump. Also fits select Bryant and Payne heat pump models using the HK32EA001 board — verify your existing board's part number label before ordering. Before replacing, test your defrost thermostat and outdoor temperature sensor; if those components test good, a failed HK32EA001 board is the likely culprit. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you order — contact us today.