OEM Carrier Defrost Control Board CESO110063-02 for Model HA1BJX060000AAAA

This is the factory OEM defrost control board (part number CESO110063-02) for the Carrier HA1BJX060000AAAA heat pump system. The defrost control board manages the automated defrost cycle, monitoring outdoor coil temperature and run time to prevent ice buildup on the heat pump's outdoor unit. When this board fails, you may notice the outdoor coil freezing solid, the system stuck in defrost mode, inability to switch between heating and cooling, or the unit running continuously without defrosting. Left unaddressed, a failed defrost board can cause compressor damage and complete system failure.

• Specs: OEM Part No. CESO110063-02 | Factory-matched defrost timing and temperature logic | Designed for Carrier HA1BJX060000AAAA 5-ton heat pump | Includes integrated defrost timer and relay outputs
• OEM vs Generic: This is a genuine Carrier OEM board with factory-programmed defrost intervals and trip points. Aftermarket boards may use approximate timing logic that causes premature or missed defrost cycles, risking coil damage and compressor failure over time.
• Install Difficulty: 3/5 — Requires disconnecting 24V control wiring harnesses, outdoor temperature sensor leads, and relay connectors. Tools needed: Phillips and flat-head screwdrivers, needle-nose pliers, multimeter, and phone or camera for wiring documentation. We strongly recommend photographing all wiring connections before removal.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Direct OEM replacement for Carrier model HA1BJX060000AAAA heat pump systems. Always verify your existing board's part number against CESO110063-02 before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by to verify compatibility before you purchase — no guesswork, no returns.