OEM Carrier Defrost Control Board HK32EA001 for Model PH4ANG036000BBAA

This is the factory OEM defrost control board (part number HK32EA001) for the Carrier PH4ANG036000BBAA heat pump. The defrost control board manages the automatic defrost cycle, monitoring outdoor coil temperature and run time to prevent ice buildup on the heat pump's outdoor unit. When this board fails, common symptoms include the outdoor coil icing over completely, the system failing to enter or exit defrost mode, reduced heating efficiency, or the unit locking out entirely. Replacing the defrost control board with a genuine OEM part restores factory-programmed defrost timing and ensures reliable year-round heat pump operation.

• Specs: OEM Part Number HK32EA001 | Factory-matched defrost timing and sensor inputs | Designed for Carrier PH4ANG036000BBAA 3-ton heat pump | Includes all mounting hardware connection points per original design
• OEM vs Generic: OEM defrost boards use factory-calibrated algorithms for defrost initiation and termination. Generic boards often use generalized timing that can result in over-frosting, short defrost cycles, or premature compressor wear — costing far more than the savings up front.
• Install difficulty: 3/5 — Disconnect power at the breaker before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, and phone or camera to photograph all wiring connections before removal. Take care to transfer all wire harnesses and terminals exactly as positioned on the original board.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for Carrier model PH4ANG036000BBAA. Always verify OEM part number HK32EA001 against your unit's data plate and wiring diagram before ordering. Not sure about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us before placing your order.