OEM Carrier Defrost Control Board HK32EA001 for Model PH15NA018000BAAA

This is the genuine OEM defrost control board (part number HK32EA001) factory-specified for the Carrier PH15NA018000BAAA heat pump. The defrost control board manages and times the defrost cycle, signaling the reversing valve and outdoor fan to temporarily reverse refrigerant flow and melt ice buildup on the outdoor coil. When this board fails, the outdoor unit will ice over completely, the system may lock out on a fault, or the heat pump will lose heating efficiency — sometimes dropping into emergency heat mode automatically. Diagnosing a failed defrost board typically follows ruling out a faulty defrost thermostat or outdoor temperature sensor first.

• Specs: 24V control circuit | Board model CEPL130524-01 | Compatible relay: Potter & Brumfield T9AS2D22-24 | Single-phase | Dimensions approx. 6" × 4"
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP), manufactured to exact factory tolerances. Generic aftermarket boards may use lower-rated relays and off-spec timing circuits, which can cause premature failure or erratic defrost intervals — accelerating coil icing and compressor wear.
• Install difficulty: 3/5 — Disconnect power at the breaker before opening the control panel. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera to photograph all wiring harness connections prior to removal. Transfer wiring one connector at a time to avoid misrouting.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PH15NA018000BAAA heat pump split system. Also cross-references board numbers CEPL130524-01 and CEBD430524-06A. Verify your existing board's part number on the label before ordering. Our fitment team is available to confirm compatibility before you buy — reach out before placing your order if you have any questions.