Perform a Leak Detection Test on a Refrigerant Circuit That Is Filled with Refrigerant:

WARNING: This page is about a different variant/trim than selected.

-- On vehicles with a high-voltage system, switch off (deactivate) the "auxiliary climate control" function. Refer to the appropriate Service Information and the appropriate Infotainment/MMI Operating Information.

-- 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

Courtesy of AUDI OF AMERICA, LLC

Depending on the model, leak detection is indicated by an increase in clicking rate or a warning tone. Refer to the appropriate Leak Detection Device Service Information.

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.