For technicians performing chiller maintenance or diagnosing communication faults

Always verify the process temperature does not exceed these mechanical limits

and a dial knob to replace a wide range of OEM controls

replacing a worn positioner spring often resolves issues where the valve fails to reach its commanded position due to loss of tension or incorrect span signals

Trane SWT3411 Limit Switch R-407A For technicians performing chiller maintenanceThe Trane SWT3411 Limit Switch is a critical safety component designed for precise thermal regulation within residential furnaces and HVAC systems. As an OEM high limit control, this L150F 30F switch features a fixed 150F open temperature and a 30F differential, ensuring the system shuts down if heat exchanger temperatures exceed safe operating parameters. Engineered for the rigors of field service, the Trane L150 30 limit switch utilizes a single