OEM Carrier Defrost Control Board CESO130076-00 for Model PH3ZNA036000AA

This OEM Carrier defrost control circuit board (part number CESO130076-00, superseded by HK32EA008) is the factory-specified replacement for the Carrier PH3ZNA036000AA heat pump. The defrost control board serves as the operational brain of your outdoor unit — it continuously monitors defrost sensors and safety switches, manages timed defrost cycles, and coordinates voltage signals to the reversing valve, compressor, and fan motor. When this board fails, common symptoms include the outdoor unit failing to enter or exit defrost mode, compressor short-cycling, erratic or locked-out operation, and frost or ice buildup accumulating on the outdoor coil even in mild ambient temperatures.

• Part Specs: OEM Carrier Defrost Control Circuit Board | Part # CESO130076-00 (superseded by HK32EA008) | Fits Carrier, Bryant & Payne heat pump platforms | Factory-matched relay and sensor circuit tolerances
• OEM vs Generic: This is a genuine OEM-grade replacement engineered to exact Carrier factory specifications. Generic aftermarket boards frequently use off-tolerance relays and under-rated capacitors that can cause premature failure and void equipment warranties — OEM is always the recommended choice for defrost control boards.
• Install Difficulty: 3/5 — Disconnect all power before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a multimeter, and a smartphone to photograph all wiring harness connections before removal. Label every connector. Defrost boards involve low-voltage and line-voltage terminals — exercise caution and verify power is off at the disconnect and breaker before touching any terminals.
• Warranty & Shipping: Backed by a 1-year OEM factory warranty. In stock and ships same business day from our warehouse — get your heat pump back online fast.

Compatibility: Designed as a direct OEM replacement for the Carrier PH3ZNA036000AA heat pump. Also cross-compatible with select Bryant and Payne heat pump models sharing the CESO130076-00 / HK32EA008 board specification. Always verify your unit's existing board part number against your data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork.