OEM Carrier Defrost Control Board CESO110063-02 for Model HC1AJX036000AAAA

This is the genuine OEM defrost control board for the Carrier HC1AJX036000AAAA heat pump system. The defrost control board manages the automatic defrost cycle, monitoring outdoor coil temperature and run time to prevent ice buildup that can restrict airflow and damage the compressor. When this board fails, you may notice the outdoor unit freezing solid, the system locking out without defrosting, erratic switching between heating and cooling modes, or a complete loss of heat pump function. Replacing this board with the correct OEM part ensures the factory-programmed defrost timing and temperature thresholds are fully restored.

• Specs: OEM Part Number CESO110063-02 | Factory-programmed defrost logic | 24V control circuit compatible | Direct drop-in replacement with original mounting configuration
• OEM vs Generic: OEM control boards carry factory-exact firmware and component ratings. Aftermarket boards may use mismatched defrost timing intervals or inferior relay contacts, leading to premature failure or incomplete defrost cycles that void compressor warranties.
• Install Difficulty: 3/5 — Disconnect power at the disconnect box and verify voltage is absent before handling the board. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, and a multimeter. Photograph all wiring harness connections before removal. Note the board orientation and any jumper settings on the existing board before swapping.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier HC1AJX036000AAAA 3-ton heat pump condenser. Always confirm the OEM part number CESO110063-02 against your unit's data plate or existing board label before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get your system back to peak efficiency fast.