OEM Carrier Defrost Control Board CESO110063-02 for Model HB1BJX036000AAAA

This is the factory OEM defrost control board (part number CESO110063-02) for the Carrier HB1BJX036000AAAA heat pump system. The defrost control board monitors outdoor coil temperature and manages timed defrost cycles to prevent ice buildup on the outdoor unit. When this board fails, you may notice the outdoor coil freezing solid, the system running in emergency heat continuously, erratic defrost cycling, or a complete loss of heating capacity — even when outdoor temperatures are only mildly cold.

• Specs: OEM Part Number CESO110063-02 | Factory-matched defrost timing logic | Compatible with 3-ton (036) heat pump configuration | Designed for R-22 or R-410A system integration per unit specification
• OEM vs Generic: OEM defrost boards use factory-calibrated defrost initiation and termination logic. Aftermarket boards frequently use generalized timing intervals that cause over-defrosting or under-defrosting, reducing efficiency and compressor life. This board is the exact unit shipped from Carrier's assembly line.
• Install Difficulty: 3/5 — Requires disconnecting low-voltage control wiring and high-voltage connections at the board. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and masking tape or phone camera to label all wiring before removal. Always shut off power at the disconnect and breaker before servicing.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier HB1BJX036000AAAA heat pump unit. Always verify your existing board's part number against CESO110063-02 before ordering, and cross-check the data plate on your outdoor unit. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — no guesswork.