Title: Identify refrigerant type; select and connect proper gauge set/test equipment; record temperature and pressure readings.
Course: Automotive Technology III (20104-III) > Section: Heating, Ventilation, and Air Conditioning (HVAC): General-Air Conditioning (AC) System Diagnosis and Repair

Procedures should include using

- refrigerant identifier
- under-hood reference information
- service fittings
- proper gauge
- a thermometer to record ambient and in-dash temperature
- industry temperature and pressure charts
- federal laws and guidelines associated with the proper handling of refrigerants.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VII. Heating, Ventilation, and Air Conditioning (HVAC)
A. General: Air Conditioning (A/C) System Diagnosis and Repair
Task 5

Process/Skill Questions:

- What tools should be used to identify the refrigerant type?
- Why should a technician check refrigerant type before servicing?
- What are the procedures for checking the refrigerant type?