Note. Minor leaks can be detected, for example, with an electronic detector.
1. Evacuate the refrigerant circuit using an air conditioner service stand.
Note.
- If a relatively large leak is already detected during evacuation, the leak must be found and repaired.
- If no leak is found during evacuation, or if the leak is so small that it is impossible to find the leak, proceed as follows.
- The gaseous refrigerant is rapidly carried away by the air currents. Therefore, when looking for a leak, avoid drafts.
- If the circulation circuit is completely empty, fill it with refrigerant to approx. 10% of the filling capacity (see sticker R134a or workshop manual for the respective vehicle).
Search for a leak
1. Prepare the leak detector for operation, see the instrument manual.
2. Move the test probe under the suspected leak.
3. If the click frequency increases or a characteristic sound signal is emitted (depending on device design), leak location found (see leak detector instruction manual).