OEM Carrier Defrost Control Circuit Board CESO130076-00 for Model PH3ZPA030000AA

This is the OEM factory-specified defrost control circuit board for the Carrier PH3ZPA030000AA heat pump. The control board serves as the central "brain" of your unit, continuously monitoring sensors and safety switches while coordinating and executing all system operations — including the critical defrost cycle that prevents ice buildup on the outdoor coil in heating mode. When this board fails, you may experience symptoms such as the unit failing to defrost, erratic cycling, no heating or cooling output, or a complete system lockout with no response to the thermostat. Also cross-references as successor part HK32EA008 (CEPL130433-02 / CEBD430433-09A).

• Part Number: CESO130076-00 | Also superseded by HK32EA008 | Compatible with Carrier, Bryant, and Payne heat pump platforms
• OEM vs Generic: This is a genuine OEM board built to exact factory specifications — not a third-party clone. Aftermarket control boards often use lower-grade microcontrollers and relays that fail prematurely, void equipment warranties, and may cause erratic system behavior. Only an OEM board guarantees precise defrost timing, sensor thresholds, and safety lockout logic.
• Install Difficulty: 4/5 — Control board replacement requires full system shutdown and capacitor discharge before opening the cabinet. Tools needed: ¼" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness positions before removal. Label every connector. Verify 24V control power at transformer output before condemning the board. Professional installation strongly recommended.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our climate-controlled warehouse. Secure packaging to prevent board damage in transit.

Compatibility: Engineered as the factory replacement for Carrier model PH3ZPA030000AA heat pump systems. Also fits select Bryant and Payne units sharing the same control board platform — verify your data plate part number before ordering. Not sure if this board fits your unit? Contact our fitment team before you buy — we verify compatibility at no charge.