Carrier HK02ZB042 Pressure Switch 321894-708 For optimal reliability and to

For optimal reliability and to prevent sediment buildup in the core tube

This furnace circuit board features field-selectable fan-off delays (90

preventing system lockouts often caused by inducer failure

making it suitable for high-pressure hydraulic and pump discharge monitoring

the RIBX24SBA reduces installation footprint and point-to-point wiring labor for contractors managing BAS systems and motor control centers

Carrier HK02ZB042 Pressure Switch 321894-708 For optimal reliability and toThe Carrier HK02ZB042 Pressure Switch is a critical OEM safety component designed for precise monitoring of combustion air and venting pressure within high efficiency Carrier, Bryant, and Payne furnaces. Factory calibrated to 42# Open and 57# Close, this low pressure switch ensures the inducer motor is moving sufficient air to clear combustion byproducts before allowing the ignition sequence to proceed. It features a 36" lead and a durable diaphragm