The copyright HK06WC069 SPST Pressure Switch is a reliable airflow and safety control component used in copyright furnaces and HVAC units. Designed with a 0.27" WC break and 0.42" WC activation rating, it monitors proper air pressure levels within the system. When the pressure varies outside the required range, the switch signals the control board to prevent unsafe operation and prote... https://www.partshnc.com/3wc-spst-pressure-switch-3