OEM Carrier Defrost Control Board HK32EA007 for Model PH13NB024000AAAA

This is the genuine OEM Carrier defrost control board (part number HK32EA007), the factory-specified replacement for the Carrier PH13NB024000AAAA heat pump. The defrost control board manages the automatic defrost cycle — monitoring outdoor coil temperature and initiating timed defrost sequences to remove frost and ice buildup from the evaporator coil. When this board fails, common symptoms include a heat pump that never enters defrost mode (leading to a heavily iced outdoor unit), a system that gets stuck in defrost and blows cold air indoors, or a unit that short-cycles and shuts down on fault lockout. Replacing the board with a genuine OEM part restores factory-programmed defrost timing and temperature logic.

• Part Number: HK32EA007 | Also cross-references: 1177927, 1173636 | OEM Carrier / Bryant / Payne heat pump defrost board
• OEM vs Generic: This is a 100% genuine Carrier OEM board — not an aftermarket clone. OEM boards retain factory defrost timing intervals and termination thresholds, which aftermarket boards may approximate but rarely replicate exactly, risking premature coil icing or compressor stress.
• Install Difficulty: 3/5 — Requires shutting off power at both the breaker and disconnect before accessing the control compartment. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone camera to photograph wiring harness positions before disconnecting. Transfer wiring connections one at a time to avoid errors. Recheck all low-voltage thermostat wire terminals after installation.
• Warranty: 1-year OEM manufacturer warranty from date of purchase. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Engineered as the direct factory replacement for Carrier model PH13NB024000AAAA split-system heat pumps. This board also cross-applies to select Bryant and Payne heat pump platforms sharing the same control architecture. Always verify your existing board's part number against HK32EA007 before ordering. Our parts specialists are available to confirm fitment — contact us before you buy if you have any questions. Order today and get same-day shipping.