OEM Carrier Defrost Control Board HK32EA001 for Model PH3ANA036000BAAA

This is the factory-specified OEM defrost control board (part number HK32EA001) for the Carrier PH3ANA036000BAAA heat pump. The defrost control board monitors outdoor coil conditions and precisely times the defrost cycle — reversing refrigerant flow to melt accumulated frost from the outdoor coil before returning to heating mode. When this board fails, the most common symptoms include a coil that stays heavily iced or frosted over, the unit failing to initiate a defrost cycle at all, or the system locking out on a low-pressure fault caused by restricted airflow across a frozen coil. Replacing this board with the correct OEM part restores factory defrost timing logic and prevents compressor damage from sustained frost buildup.

• OEM Part Number: HK32EA001 | Also supersedes: HK32EA007, CEPL130524-01, CEBD430524-06A, 1173636, 1177927 | Factory Authorized Carrier Replacement Parts division
• OEM vs Generic: This is the genuine Carrier OEM board — not an aftermarket clone. OEM boards maintain exact defrost initiation thresholds and termination logic. Generic boards often use looser timing tolerances that can result in over-defrost (efficiency loss) or under-defrost (coil icing and compressor strain).
• Install Difficulty: 3/5 — Disconnect power at the disconnect box and wait 5 minutes before opening the control panel. Photograph all wiring connections and terminal labels before removing the old board. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, non-contact voltage tester. Note defrost time selection jumper setting before swapping boards.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse — order by 3 PM for guaranteed same-day dispatch.

Compatibility: Designed as a direct OEM replacement for the Carrier PH3ANA036000BAAA heat pump (3-ton, R-410A). Cross-compatible with select Carrier, Bryant, and Payne heat pump models sharing the HK32EA001 board specification — always verify the part number on your existing board's label before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy.