OEM Carrier Defrost Control Board HK32EA001 for Model PH4RNG042000BAAA

This is the factory OEM defrost control board (part number HK32EA001) for the Carrier PH4RNG042000BAAA heat pump split system. The defrost control board is the nerve center of your heat pump's defrost cycle — it monitors outdoor coil temperature and run time, then initiates a timed defrost sequence to melt accumulated frost and ice from the outdoor coil. When this board fails, the outdoor unit becomes encased in ice, heat output drops dramatically, and in severe cases the compressor can be damaged from refrigerant flood-back. Common failure symptoms include a permanently frosted outdoor coil, the system failing to switch the reversing valve between heating and cooling modes, or the unit running but delivering little to no heat on cold days.

• OEM Part Number: HK32EA001 | Also references CEPL130524-01, CEBD430524-06A | Factory Authorized Carrier Replacement Components Division
• Specs: 24V control voltage | 5A rated | 1-phase | Compatible board type: Defrost Timer/Control | Dimensions approx. 6" × 4"
• OEM vs Generic: This is a genuine OEM Carrier board — factory-programmed defrost intervals and termination logic match the exact specifications of your PH4RNG042000BAAA unit. Aftermarket boards often use generic defrost timing that can over-defrost (wasting energy) or under-defrost (allowing ice buildup), shortening compressor life.
• Install Difficulty: 3/5 — Requires disconnecting 24V low-voltage wiring harnesses and outdoor thermostat/sensor leads. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone camera to photograph wiring before removal. Always disconnect power at the disconnect box before servicing. Label all wires prior to removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Verified fit for Carrier model PH4RNG042000BAAA heat pump split-system condensers. Cross-references include board numbers CEPL130524-01 and CEBD430524-06A. Always confirm your existing board's part number against HK32EA001 before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us and we'll confirm. In stock and ready to ship today.