OEM Carrier Defrost Control Board HK32EA003 for Model PH3GNAA24000AA

This is the factory OEM defrost control board for the Carrier PH3GNAA24000AA packaged heat pump. The defrost control board serves as the command center for the defrost cycle — it monitors outdoor coil temperature and run-time intervals, then triggers the reversing valve and auxiliary heat to shed ice buildup from the outdoor coil. When this board fails, symptoms include a coil that freezes solid with no defrost cycle initiating, a unit locked out on fault, loss of heating capacity in cold weather, or erratic short-cycling that never clears frost.

• OEM Part Number: HK32EA003 | Also cross-references: CEPL130433-01, CEBD430433-08A, CES0130076-00 | Factory-matched for Carrier PH3GNAA24000AA
• OEM vs Generic: This OEM board uses factory-spec timing intervals and termination thresholds. Aftermarket boards can mis-time the defrost cycle, leaving coils over-frosted or running unnecessary defrost cycles that reduce efficiency and raise operating costs.
• Install Difficulty: 3/5 — Requires disconnecting 24V control wiring and line-voltage connections. Tools needed: Phillips and flat-head screwdrivers, needle-nose pliers, multimeter for voltage verification. Always label or photograph all wiring connections before removal. Disconnect power at the disconnect box before servicing.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH3GNAA24000AA packaged heat pump. This board also supersedes legacy part number CES0130076-00. Verify your existing board's part number against HK32EA003, CEPL130433-01, or CEBD430433-08A before ordering. If your unit currently carries HK32EA008 as the installed board, that is the updated successor revision and may differ. Questions about fitment? Our HVAC parts specialists verify compatibility before every order ships.