What should technicians do before servicing a refrigeration system?

Before servicing a refrigeration system, it is essential for technicians to assess the system for safe operation and check for potential hazards. This step is crucial because it ensures both the safety of the technician and the integrity of the equipment. By evaluating the system first, technicians can identify any leaks, gauge the refrigerant levels, and verify that all safety protocols are in place. This proactive approach helps prevent accidents and ensures that any work performed will be done under safe and optimal conditions.

The other options do not align with best practices. For instance, indiscriminately replacing components can lead to unnecessary costs and may not address the root cause of any issues present. Increasing pressure in the system could potentially cause further damage or create dangerous situations. Consulting only the manufacturer's manual is not adequate since technicians also need to assess the physical condition of the system and adhere to general safety guidelines outside of just what the manual states.