To find a suspected refrigerant leak on a freezer room evaporator, what is the best course of action?

The best course of action to find a suspected refrigerant leak on a freezer room evaporator is to leak test the evaporator with the unit in shutdown. Conducting the leak test while the unit is turned off allows for a safer and more controlled environment. It reduces the risk of injury or accidents that could occur from working around moving parts or electrical components that are active.

When the unit is in operation, it may create airflow and vibrations that can make it difficult to accurately detect the source of the refrigerant leak. In contrast, with the unit turned off, the refrigerant will remain stationary, and any escaping gas may be more easily identified, facilitating a more precise detection of the leak's location.

Additionally, shutting down the unit allows technicians to use specific leak detection tools, such as electronic leak detectors or bubbles, without interference from the refrigerant flow or compressor action. This method provides clarity and ensures a proper analysis of the system without additional variables complicating the detection process.

Overall, for safety and accuracy, conducting a leak test when the system is not operational is the most effective approach to identifying and resolving refrigerant leaks.