The high-pressure switch is a safety device that automatically shuts down the system if the refrigerant pressure gets too high. This protects the compressor and other components from being damaged by excessive stress. High pressure can be caused by a dirty condenser coil or a failed condenser fan motor. If your unit frequently cuts out, this switch may be doing its job to prevent a total system failure. You can find replacement switches and other parts in our online catalog. It is a critical "silent protector" built into every professional-grade unit we sell. Regular annual inspections help ensure this switch is operating correctly.