Carrier HK42FZ031 Circuit Board 30067439-890 Integrated Safety Controls: Features factory-installed

Integrated Safety Controls: Features factory-installed circuit breakers and primary/secondary thermal limits for robust system protection

This includes all 66 series (366 through 966) and 68 series (268 through 978/968V) units

making it suitable for both cooling-only and heat pump cycles

Advanced Sensing Technology: Employs a heated diode with alkali metal ionization for superior sensitivity compared to standard corona discharge sensors

this valve operates independently of external electrical power

Carrier HK42FZ031 Circuit Board 30067439-890 Integrated Safety Controls: Features factory-installedThe Carrier HK42FZ031 Circuit Board is a critical OEM replacement component designed for high performance furnace control and integrated system management. Engineered for precision, this furnace control board regulates essential functions including the blower motor, gas valve, and igniter sequences. As a genuine Carrier furnace part, the HK42FZ031 ensures seamless communication between system sensors and the thermostat, maintaining optimal airflow and