Always verify that your motor's amperage and horsepower do not exceed the 12A/3/4 HP limits

Key Benefits for Technicians: Precise Calibration: Specifically sized for 200k

The nickel plating on the 5300-043 offers superior protection against oxidation compared to standard copper

Precise Fan Cycling: Maintains stable head pressure to prevent evaporator icing and ensure consistent expansion valve performance

always verify the specific tray configuration before installation

Carrier HK42FZ020 Control Board 320720-756 Always verify that your motor'sThe Carrier HK42FZ020 Control Board is a critical OEM replacement part designed for two stage gas furnace systems. This furnace circuit board serves as the central logic unit, managing the complex sequence of operations for high efficiency heating cycles. Engineered for Carrier, Bryant, and Payne equipment, it replaces previous iterations like the HK42FZ019, providing reliable control over the inducer motor, hot surface igniter, and blower motor