Perform a leak detection test on a refrigerant circuit that is filled with refrigerant:

WARNING: This page is about a different car, the 2022 Volkswagen ID.4 and 2021 Volkswagen ID.4. However, it is still accessible from the selected car via links, so may be relevant.

-- Switch off the ignition.

-- Start up the leak detector in line with relevant operating instructions.

-- Always hold the test probe underneath the suspected leak.

Fig 1: A/C Refrigerant System, Checking For Leaks

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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.