Description
The Trane SWT02968 Air Pressure Switch 28VA Pilot Duty 1.4” WC monitors the airflow level within the system and signals the control board to start or stop operation based on pressure conditions. It works through a diaphragm mechanism that reacts to changes in air pressure, opening or closing an electrical circuit to confirm safe operating conditions. Within HVAC systems such as furnaces, air handlers, and packaged heating units, it ensures proper draft and airflow verification before ignition or continued operation. Located in the airflow or venting pathway, it supports safe system sequencing, prevents unsafe startup conditions, and maintains reliable operational control.
