OEM Carrier Defrost Control Board HK32EA003 for Model PH3GNAA36000AA

This is the factory OEM defrost control board for the Carrier PH3GNAA36000AA packaged heat pump. The defrost control board serves as the command center for your system's defrost cycle, monitoring outdoor coil temperature sensors and initiating timed defrost sequences to prevent ice accumulation on the outdoor coil. When this board fails, the most common symptoms include a completely frozen outdoor coil, the unit running in continuous defrost, a system that locks out on fault codes, or a heat pump that fails to deliver adequate heating during cold weather operation.

• OEM Part Number: HK32EA003 | Also supersedes CES0130076-00 | Factory board for Carrier PH3GNAA36000AA packaged heat pump systems
• OEM vs Generic: This is the genuine OEM board manufactured to Carrier's exact electrical specifications, including precise defrost timing logic, sensor input thresholds, and relay output ratings. Aftermarket boards frequently use off-spec components that can trigger nuisance lockouts or shorten compressor life by initiating defrost cycles at the wrong intervals.
• Install Difficulty: 3/5 — Disconnect power at the disconnect box and verify zero voltage before handling. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, and a phone or camera to photograph all wiring harness connections before removal. Transfer wiring harness connectors one at a time to avoid miswiring.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM EST.

Compatibility: Designed for the Carrier PH3GNAA36000AA packaged heat pump unit. Also cross-references to Bryant and Payne models sharing the same board footprint and part number. Always confirm your existing board's part number against HK32EA003 or CES0130076-00 before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back up and running fast.