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This is the genuine OEM Carrier defrost control board (part number HK32EA001), the factory-specified replacement for the Carrier PH13PR06000GAFAA 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 — a critical function for maintaining heating efficiency in cold weather. When this board fails, the heat pump will stop entering the defrost cycle entirely, leading to progressive ice accumulation, reduced airflow, loss of heating capacity, and eventual compressor damage if left uncorrected. Common symptoms include a heavily iced outdoor coil, continuous fan operation with no defrost, or a unit that trips on high-pressure lockout during heating mode.
Compatibility: Designed for the Carrier PH13PR06000GAFAA heat pump and compatible Carrier, Bryant, and Payne split-system heat pump models using the HK32EA001 board. Verify your existing board's part number on the label before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — in stock and ready to ship today.