OEM Carrier Defrost Control Board HK32EA008 for Model PH4GEAA48000AA

This is the genuine OEM defrost control board (part number HK32EA008), factory-specified for the Carrier PH4GEAA48000AA heat pump. The defrost control board monitors outdoor coil temperature sensors and automatically switches the system between heating and defrost modes to prevent frost and ice buildup on the outdoor coil. When this board fails, symptoms typically include a heavily iced-over outdoor coil, the system failing to enter defrost mode, loss of heating capacity, or short-cycling in cold weather — all signs that the board is no longer initiating or completing defrost sequences correctly.

• Specs: OEM part number HK32EA008 | Replaces HK32EA003 | Compatible with Carrier, Bryant, and Payne heat pump platforms | Selectable defrost intervals: 30, 60, 90, and 120 minutes
• OEM vs Generic: This is a genuine Carrier factory-authorized board manufactured to exact OEM specifications. Aftermarket boards often lack Quiet Shift Technology and adjustable timing sequences, increasing the risk of noisy transitions and premature cycling failure.
• Install Difficulty: 3/5 — Disconnect power at the breaker and confirm voltage is absent before handling. Tools needed: ¼" nut driver, Phillips screwdriver, needle-nose pliers, multimeter. Photograph all wire connections before removal. Note jumper positions for defrost interval settings and transfer them to the new board exactly.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH4GEAA48000AA heat pump. Also fits select Bryant and Payne models using the HK32EA003 or HK32EA008 board. Always verify your existing board's part number against the unit's wiring diagram before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.