Title: Determine the need for an additional AC system filter.
Course: Automotive Technology III (20104-III) > Section: Heating, Ventilation, and Air Conditioning (HVAC): Refrigeration System Component Diagnosis and Repair

Determination should include

- using proper refrigerant recovery equipment (required)
- identifying A/C compressor failure, and, if it has failed, adding a filter on the low-pressure line and other required components per manufacturer guidelines.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VII. Heating, Ventilation, and Air Conditioning (HVAC)
B. Refrigeration System Component Diagnosis and Repair
Task 5

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?