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This is the genuine OEM factory-replacement defrost control board (part number HK32EA001) for the Carrier PH13PR060000AAAA heat pump. The defrost control board monitors outdoor coil conditions and initiates timed defrost cycles to prevent frost and ice buildup on the evaporator coil. When this board fails, your heat pump may run continuously in heating mode with a frozen outdoor coil, fail to enter defrost at all, or short-cycle due to high-pressure lockout — all classic signs of defrost board failure. Before replacing, verify that your defrost thermostat and outdoor temperature sensor are functioning correctly; if both check out, the board is the likely culprit.
Compatibility: Designed as a direct drop-in replacement for the Carrier PH13PR060000AAAA heat pump. Also compatible with select Bryant and Payne heat pump models sharing the HK32EA001 board specification — verify your unit's data plate and existing board part number before ordering. Need help confirming fitment? Our HVAC parts specialists are available to verify compatibility before you buy.