Pressure switches are safety devices calibrated to the specific venting and blower characteristics of the furnace

the direct-coupled mounting uses a push-button release mechanism

outlet pressure to ensure precise fuel metering and combustion efficiency

this 2-way valve is designed to handle hot and chilled water

Trane SWT3073 Pressure Switch 322056-301 Pressure switches are safety devicesThe Trane SWT3073 Pressure Switch is an essential OEM replacement component for residential and light commercial gas fired furnaces. This SPDT (Single Pole Double Throw) air pressure switch is factory calibrated with a . 76" WC set point to monitor inducer motor airflow and verify appropriate negative pressure before allowing the ignition sequence to proceed. As a critical safety interlock, the Trane SWT03073 prevents unsafe operation by interrupting