Determination should include
- using the proper refrigerant recovery equipment (required)
- identifying the A/C compressor failure, and, if it has failed, adding a filter on the low-pressure line and other required components per manufacturer guidelines.
Process/Skill Questions:
- How and why would a technician install an AC filter?
- What procedures would one use to decide if a redundant AC filter is needed?
- What might be the source of debris or contamination that would require an additional filter?