REFRIGERANT CIRCUIT, TRACING LEAKS, WITH Electronic Leak Detector :VAG1796

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

NOTE:

Minor leaks can be detected using an electronic leak detector for example.

-- Evacuate the refrigerant circuit with the A/C Service Station. Refer to REFRIGERANT CIRCUIT, EVACUATING WITH A/C Service Station .

NOTE:

Be ready to evacuate a large leak should one be found. Refer to REFRIGERANT CIRCUIT, EVACUATING WITH A/C Service Station .

If no leak is found during evacuation or there is a leak that is so small that the location cannot be found, proceed as follows. Refer to SEARCHING FOR REFRIGERANT CIRCUIT LEAKS WITH COMPRESSED AIR OR NITROGEN .

Currents of air quickly disperse refrigerant gas. Drafts must therefore be avoided during leak detection.

If the refrigerant circuit is completely empty, fill with refrigerant to approximately 10% of the fill capacity (R134a label or vehicle-specific Service Information).

Leak Detection:

-- Start up 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 operating instructions for leak detector).

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.