To troubleshoot compressor failures, HVAC professionals should follow a systematic approach, including visual inspections, electrical tests, and refrigerant system checks. Visual inspections should include checking for signs of physical damage, corrosion, or wear on the compressor and surrounding components. Electrical tests should verify proper voltage, current, and resistance readings. Refrigerant system checks should include leak detection, refrigerant charge verification, and system pressure tests. By following these diagnostic procedures, professionals can identify the root cause of the compressor failure and recommend the appropriate solution.