NATE Low Global Warming Potential (GWP) Practice Test

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Which action is indicated when refrigerant is added to an A2L system at least once within a three-year period?

Normal operation

Proof of a leak

Adding refrigerant to an A2L system within three years shows the system has lost refrigerant, meaning there is a leak. Normal operation doesn’t require replenishing charge, and routine maintenance would not hinge on adding refrigerant. Leaks must be located and repaired, with documentation, before the system is deemed OK to continue operating. That is why the action is considered proof of a leak. Certification renewal or other options aren’t tied to refrigerant additions in this context.

Routine maintenance

Certification renewal