Carrier HK35AA009 Circuit Board

The Carrier HK35AA009 Circuit Board is a genuine OEM multi-function sequence timer designed to replace legacy electromechanical timers in Carrier, Bryant, and Payne HVAC equipment. This printed control board serves as a critical timing control unit, specifically engineered to manage compressor time delays and safeguard systems against short-cycling and momentary power interruptions. Unlike universal aftermarket boards, the HK35AA009 is a direct factory authorized part that ensures precise signal transmission and proper amperage handling for industrial and residential chillers and furnaces.

This HVAC control board is a field-proven replacement for older part numbers including HK35AA005, HK25AZ080, 30HK680001, and HK25AZ070. Technicians regularly utilize this board in Carrier 30HK, 30HL, 38AH, 48MA, and 50DA series models to resolve lock-out issues caused by voltage dips. Its multi-function electronic design incorporates advanced microprocessor algorithms for accurate fault detection and timing sequences, providing a higher level of reliability than the mechanical relays it replaces.

Key Benefits for Technicians:

• Direct OEM Compatibility: Engineered as a drop-in printed circuit board replacement for Carrier HK35AA009, eliminating the need for complex field modifications.
• Advanced Timing Logic: Integrated sequence timer prevents rapid compressor cycling, reducing mechanical wear on the contractor and motor.
• Enhanced System Resilience: Designed to prevent nuisance lock-outs during brief power interruptions of less than 50 milliseconds.
• Broad Application: Certified for use across Carrier and Bryant commercial chillers and residential furnace systems.
• Precision Engineering: Built to exact RCD (Replacement Components Division) specifications for high-tolerance electrical performance.

Common Questions:

What models does the HK35AA009 support?
This Carrier control board is compatible with a wide range of equipment, including 30HL chillers, 30HK units, and 38AH condensing units. It is specifically designed to replace older mechanical-style compressor time delay relays.

Can this board replace an HK25AZ080?
Yes, the HK35AA009 is the current OEM substitute for both the HK25AZ070 and HK25AZ080. It provides modern electronic timing versus the older electromechanical style.

What does the multi-function timer regulate?
It manages the timed operations of the HVAC cycle, ensuring the system starts and stops with the necessary delays to protect the compressor and optimize energy efficiency.

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.