Title: Inspect HVAC system ducts, doors, hoses, cabin filters, and outlets; determine needed action.
Course: Automotive Technology III (20104-III) > Section: Heating, Ventilation, and Air Conditioning (HVAC): Operating Systems and Related Controls Diagnosis and Repair

Inspection should include

- checking ducts, doors, and outlets for proper air flow
- determining cause of any obstructions or abnormal noise
- checking cabin filter for needed service.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VII. Heating, Ventilation, and Air Conditioning (HVAC)
D. Operating Systems and Related Controls Diagnosis and Repair
Task 6

Process/Skill Questions:

- How should a technician inspect AC-heater ducts, doors, hoses, cabin filters, and outlets?
- How often should cabin filters be serviced?
- What might happen if the cabin filter becomes restricted?