OEM Carrier Defrost Control Board HK32EA001 for Model PH12NA01800GAGAA

This is the factory OEM defrost control board for the Carrier PH12NA01800GAGAA heat pump. The defrost control board monitors outdoor coil temperature and ambient conditions, initiating timed defrost cycles to prevent ice buildup on the outdoor coil. When this board fails, your heat pump may stay locked in cooling mode, fail to reverse into heating, short-cycle erratically, or run continuously without ever triggering a defrost cycle — leaving you with a frozen-over outdoor unit and no heat on the coldest days.

• Specs: OEM Part # HK32EA001 | Board ID: CEPL130524-01 / CEBD430524-06A | 24V control voltage | 5A | Single-phase | Compatible relay: Potter & Brumfield T9AS2D22-24
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact factory tolerances. Generic boards often use lower-rated relays and off-spec timing circuits that can cause premature re-failure or incorrect defrost interval timing, risking compressor damage from sustained ice load.
• Install difficulty: 3/5 — Requires shutting off power at the disconnect and breaker before opening the control panel. Photograph all wiring harness connections before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera for wiring documentation. Note: discharge any capacitors present before reaching into the control compartment.
• Warranty: 1-year OEM factory warranty on parts and workmanship. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier PH12NA01800GAGAA heat pump. Also fits a broad range of Carrier, Bryant, and Payne heat pump models — verify your unit's data plate part number matches HK32EA001 before ordering. Cross-reference board IDs CEPL130524-01 or CEBD430524-06A confirm compatibility. Need help verifying fitment? Our HVAC parts specialists confirm fit before you buy — contact us today and get your unit back online fast.