During a leak test, what consideration must be taken into account?

When conducting a leak test on a refrigeration system, it is essential to assess all joints and fittings in the system. This comprehensive evaluation ensures that no potential leak points are overlooked, which is crucial since leaks can occur at any connection or joint due to wear, improper installation, or other factors.

Focusing solely on specific areas or suspected leak points can lead to missed leaks that might cause future system inefficiencies, loss of refrigerant, or environmental impacts. Thus, thoroughly inspecting every component, including all joints and fittings, will yield the most reliable results.

The other options do not emphasize the importance of a full-system assessment, which is vital for ensuring the integrity and proper functioning of the refrigeration system during and after the leak test.