Trane SWT3018 Pressure Switch 318973-401 Featuring a 2-7/8" insertion length

Featuring a 2-7/8" insertion length (inside dimension)

Common Technician Questions How do I set the defrost frequency

ensure the system is thoroughly flushed before installing this MTZ replacement

Using it with different refrigerants will lead to inaccurate superheat control and potential system instability

Integrating this furnace limit control into your York furnace maintenance routine prevents nuisance tripping and protects the heat exchanger from thermal stress

Trane SWT3018 Pressure Switch 318973-401 Featuring a 2-7/8" insertion lengthFor field techs managing low pressure protection in commercial and residential systems, the Trane SWT3018 Pressure Switch (cross referenced as SWT03018) is a critical OEM safety component. This SPST normally open pressure switch is engineered to monitor system conditions and prevent compressor damage due to refrigerant loss or extreme temperature drops. It features a precise 25 PSI open setpoint and a 41 PSI close (reset) point, making it standard for