you will need to source the 8-inch sight gauge glass separately to complete the repair

The ball checks act as a safety shut-off

Safe Manual Overide: The trip-free manual reset mechanism ensures the system cannot be restarted until the high-limit condition is corrected and manually acknowledged

Technicians typically look for a clicking sound without circuit engagement

5 Stem Assm without modification

Trane SWT2327 Switch 321142-301 you will need to sourceExperienced technicians recognize the Trane SWT2327 Switch as a critical safety component for high pressure monitoring. This OEM Trane replacement part is a Single Pole Single Throw (SPST) device with a normally closed (N C) contact configuration, providing immediate circuit interruption when system pressures exceed safe operating parameters. Designed for direct mounting on the high pressure line or near the compressor, this HVAC pressure switch