The Carrier HK32FA006 Printed Defrost Circuit Board is an critical OEM replacement component designed for Carrier, Bryant, and Payne heat pump systems. This Factory Authorized Part oversees the critical transition between heating and defrost modes, utilizing a time-and-temperature defrost logic to prevent ice accumulation on the outdoor coil. Engineered for single-phase HVAC units, the HK32FA006 ensures the reversing valve and condenser fan relay operate in a precise sequence, maintaining system efficiency during low-ambient conditions. It features integrated speed-up pins for field testing and selectable defrost intervals (30, 60, or 90 minutes) to match specific regional climate demands. This board is a direct replacement for legacy part numbers HK32FA003, HK25SZ359, and CEPL110104-02, providing exact pin-to-pin compatibility for 38QB-030-300 models and similar split-system heat pumps. Replacing a failing defrost control board with this genuine Carrier HK32FA006 restores the proper 24V signal to the W terminal, ensuring auxiliary heat engages correctly while the outdoor fan is de-energized during the defrost cycle.

• OEM Precision: Genuine Carrier HK32FA006 ensures exact timing and voltage regulation, unlike universal alternatives.
• Multi-Brand Compatibility: Verified for use in Carrier, Bryant, and Payne residential and light commercial heat pumps.
• Flexible Configuration: Adjustable defrost cycle jumpers allow technicians to optimize performance for 30, 60, or 90-minute intervals.
• Simplified Troubleshooting: On-board speed-up terminals facilitate rapid diagnostic testing of the defrost sequence in the field.
• Direct Supercession: Replaces CEAS410104, CESO110021-00, and P771-1027 without requiring cabinet modifications.

How do I verify if my HK32FA006 is initiating defrost correctly?
Technicians can short the speed-up pins to accelerate the internal timer. If the board is functional, the reversing valve should shift and the outdoor fan should stop immediately, provided the defrost sensor is closed.

Will this board work with dual-fuel or hybrid heat pump setups?
Yes, the HK32FA006 is designed to integrate with standard 24V control circuits, managing the aux heat signal to the furnace or air handler during defrost regardless of the secondary heat source.

What are the symptoms of a faulty defrost circuit board?
The most common indicators include heavy ice buildup on the outdoor coil, the system "locking" in cooling mode during winter, or the auxiliary heat failing to engage when the unit enters a defrost cycle.

Non Cancelable / Non Returnable

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.