OEM Carrier Defrost Control Board HK32EA003 for Model PH16NA02400GBAAA

This is the OEM-specified defrost control board (part number HK32EA003) for the Carrier PH16NA02400GBAAA packaged heat pump. The defrost control board governs the timing and logic of defrost cycles, signaling the system to periodically reverse refrigerant flow to melt frost accumulation on the outdoor coil. When this board fails, you may observe continuous icing on the outdoor unit, a total loss of heating capacity in cold weather, a heat pump that runs in defrost mode continuously, or a system that never initiates a defrost cycle at all — all of which degrade efficiency and can cause compressor damage if left unaddressed.

• Specs: Input Voltage: 18–30 VAC | Frequency: 50/60 Hz | Defrost duration: up to 10 minutes | Adjustable time intervals: 30 / 60 / 90 / 120 minutes | OEM part number: HK32EA003 | Cross-reference: CEBD430433-08A, CEPL130433-01, CES0130076-00
• OEM vs Generic: OEM boards are factory-calibrated to Carrier's exact defrost timing specifications, ensuring precise cycle intervals and reliable relay switching. Generic alternatives may use off-tolerance components that cause erratic defrost behavior, premature coil icing, or nuisance lockouts.
• Install Difficulty: 3/5 — Disconnect all power before beginning. Photograph all wiring connections prior to removal. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, multimeter for 24V control circuit verification. Note: HK32EA003 has been superseded by HK32EA008 — confirm board layout and connector positions match before installation.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse — no drop-ship delays.

Compatibility: Factory-specified defrost control board for the Carrier PH16NA02400GBAAA packaged heat pump. Also referenced as a Carrier and BDP defrost board compatible across multiple Carrier heat pump platforms using the CEPL130433-01 board configuration. Verify your existing board's part number and terminal layout before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase — same-day shipping on all in-stock orders.