Perform a Leak Detection Test on a Refrigerant Circuit That Is Filled with Refrigerant:
WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
-- On vehicles with a high-voltage system, switch off (deactivate) the "auxiliary climate control" function. Refer to the Owner's Manual and Infotainment/MMI Operating Manual.
-- Switch off the ignition.
-- Start up the leak detector in line with relevant operating instructions.
-- Always hold the test probe underneath the suspected leak.
Depending on the model, leak detection is indicated by an increase in clicking rate or a warning tone. Refer to the Leak Detection Device Owner's Manual.
NOTE:
Currents of air quickly disperse refrigerant gas. Drafts must therefore be avoided during leak detection.
Refrigerant gas is heavier than air and will escape.