United Technologies Carrier / Bryant HK42FZ004 Furnace Control Board

Description:

The United Technologies Carrier HK42FZ004 Control Board is an integrated furnace control board used to manage ignition sequencing, blower operation, safety monitoring, and heating cycle control in residential and light commercial gas furnaces. Commonly installed in Carrier, Bryant, and Payne furnaces requiring coordinated control of ignition systems, inducer motors, circulating blowers, and safety circuits. Maintenance technicians, HVAC service providers, and furnace repair specialists use this control board for replacement, retrofit, repair, and refurbishment of existing heating systems.

Applications:

The United Technologies Carrier HK42FZ004 Control Board is designed for gas-fired furnaces, residential heating systems, light commercial HVAC equipment, and forced-air heating applications. The board functions as the primary furnace controller, coordinating thermostat inputs, ignition sequences, flame sensing, blower timing, inducer operation, and safety shutdown functions to ensure reliable and efficient furnace performance.

Technical Specifications:

• Brand: United Technologies Carrier / Bryant
• Part Number: HK42FZ004
• Alternate Part Number: HK42FZ-004
• Product Type: Furnace Control Board
• Board Type: Integrated Furnace Control Module
• Application: Gas Furnace Control Systems
• Compatible Brands: Carrier, Bryant, and Payne
• Function: Ignition, Blower, and Safety Control
• Supports Direct Spark and Flame Monitoring Functions
• Controls Inducer Motor and Circulating Blower Operation
• Designed for Residential and Light Commercial Furnaces
• Assembly Type: Printed Circuit Board (PCB)
• Intended for OEM Equipment and Replacement Installations
• Suitable for Maintenance, Repair, and Retrofit Applications
• Engineered for Continuous-Duty HVAC Operation

Common Replacements:

• Carrier HK42FZ007 Furnace Control Board
• Carrier HK42FZ009 Integrated Furnace Control Board
• Carrier CEPL130438-01 Furnace Control Module