Description
The Trane SWT02979 Dual Pressure Switch is a monitoring component used to check proper airflow and venting conditions during operation. It uses two separate pressure sensing elements to confirm that inducer and exhaust airflow meet required limits before permitting system ignition. In HVAC systems, it is commonly installed in furnaces and packaged units to supervise combustion airflow and avoid operation when venting is restricted or abnormal. The switch integrates into the control circuit to interrupt or allow system start-up based on measured pressure values, supporting to maintain safe and controlled heating system performance.
