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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
Advanced Sensing Technology: Employs a heated diode with alkali metal ionization for superior sensitivity compared to standard corona discharge sensors
maintaining energy setpoints and reducing system wear
which simplifies piping for the technician
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
