Get the app
Quick access from your home screen.
AV-SCANNER / Service function guides / Cooling and climate
This guide covers the complete air conditioning performance test, from understanding the refrigeration cycle to interpreting pressure and vent temperature readings on any vehicle. It is written for working mechanics and serious DIYers who need a repeatable diagnostic procedure rather than guesswork. You will learn how to prepare the vehicle, connect gauges correctly, run the test under controlled conditions, and compare your results against expected ranges. By the end, you will be able to decide whether a system is performing correctly, undercharged, overcharged, restricted, or suffering from a mechanical fault.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 11 sections as a branded PDF to use in the workshop.
Get the app
Quick access from your home screen.