OEM Carrier Defrost Control Board HK32EA007 for Model PH13PR03600GAJAA

This is the genuine OEM Carrier defrost control board (part number HK32EA007), factory-specified for the Carrier PH13PR03600GAJAA heat pump. The defrost control board governs the automatic defrost cycle — sensing outdoor coil temperature and initiating timed defrost sequences to clear frost and ice accumulation from the evaporator coil. When this board fails, common symptoms include the outdoor unit freezing over completely, the system locking out on a fault code, continuous frost buildup with no defrost cycle initiating, or erratic heating performance during cold weather operation. Replacing it with the exact OEM part restores precise cycle timing and factory-calibrated temperature thresholds.

• OEM Part Number: HK32EA007 | Also cross-references: 1173636, 1177927 | Genuine Carrier factory component
• OEM vs Generic: This OEM board uses factory-calibrated defrost timing logic and certified components. Aftermarket boards may use non-spec timers and relays that result in incomplete defrost cycles or premature lockouts — especially problematic in below-freezing climates.
• Install Difficulty: 3/5 — Requires safely disconnecting power at the disconnect and breaker before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone/camera to photograph wiring harness positions before removal. Transfer low-voltage wiring connectors carefully to matching terminals on the new board.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier PH13PR03600GAJAA heat pump. Also fits select Bryant and Payne heat pump models sharing the HK32EA007 defrost board specification — verify your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment before you buy.