Description
The Trane SWT04216 Pressure Switch 0.72 PSI is a pneumatic safety valve used in furnace airflow monitoring systems. It responds to changes in inducer-generated draft pressure and verifies that venting conditions are within the required threshold before the ignition sequence is permitted. It is Found in high-efficiency furnaces where sealed combustion systems rely on precise airflow verification in HVAC systems. As part of the appliance’s safety control chain, it ensures that combustion only occurs when adequate exhaust movement is confirmed, reducing the risk of improper venting or incomplete burner startup under restricted airflow conditions.
