Carrier HK35AC002 Monitor Board

The Carrier HK35AC002 Monitor Board is a critical electrical safeguard engineered for high-efficiency three-phase HVAC systems. As a genuine OEM relay phase monitor, this board provides real-time detection of phase loss, phase reversal, and phase imbalance, preventing catastrophic motor failure and compressor burnout. Rated for 24 VAC control voltage, it features diagnostic LED indicators—typically displaying a steady green for normal operation and specific red flash patterns for overloads or fault conditions—to streamline field troubleshooting for technicians. This Carrier replacement control board is compatible with a broad range of Carrier, Bryant, and Payne equipment, including heat pumps and furnace systems manufactured between 1996 and 1999. By acting as the primary protective interface, the HK35AC002 ensures the contactor only pulls in when power parameters are within safe operating margins, maintaining system reliability and protecting expensive inductive loads from suboptimal electrical environments. Use this factory-authorized part to maintain original equipment specifications and prevent downtime caused by irregular power supply issues.

Key Benefits:

• Comprehensive Phase Protection: Actively monitors for phase imbalance and reversal to prevent motor overheating and reverse rotation.
• OEM Compatibility: Replaces CEPL130440-01 and HK35AC003, fitting over 900 models including 38YCC and 25HCD series units.
• Technical Diagnostics: Integrated LED status indicators provide immediate visual confirmation of system health and fault codes.
• Robust Electrical Safety: Designed specifically for 24V HVAC control circuits to isolate and protect sensitive components from supply line faults.

Common Questions:

How do I identify a fault on the HK35AC002 board?
Technicians should look for the LED status lights. A continuous green light indicates the system is clear, while a flashing or continuous red light indicates an overload or a hard phase fault requiring immediate attention.

Can this board be used for single-phase equipment?
No, the Carrier HK35AC002 is specifically designed as a relay phase monitor for three-phase power supplies to ensure electrical balance across all legs.

Is this a direct replacement for CEPL130440-01?
Yes, the HK35AC002 is the current factory authorized replacement for several older ICP and Carrier part numbers, including CEPL130440-01.

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.