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Volkswagen Golf Service & Repair Manual: Searching for leaks in refrigerant circuits using leak detector -V.A.G 1796

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / Detecting leaks in refrigerant circuit / Searching for leaks in refrigerant circuits using leak detector -V.A.G 1796

  Note
Small leaks can be detected with, for example, an electronic leak detector.
–  Evacuate refrigerant circuit using an air conditioner service station → Chapter.
  Note
If a larger leak is detected during the evacuation process, determine cause and rectify as described → Chapter.
If during the evacuation process no leak is detected or a very small leak is detected that but cannot be located, proceed as follows → Chapter.
Refrigerant gas is quickly dispersed by air motion. Therefore drafts must be avoided during a search for leaks.
If the refrigerant circuit is completely empty, charge with about 10% of refrigerant capacity (sticker R134a or vehicle-specific workshop manual).
Leak detection:
–  Prepare leak detector for operation according to its operating instructions.
–  Always hold probe tip under location of suspected leak.
   
If the rate of clicks rises or a howl occurs, depending on model, a leak has been found (see operating instructions for leak detector).
 

Searching for leaks in refrigerant circuits using leak detector -V.A.G 1796

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Other materials:

Measurement location
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Sanding
Avoid sanding through to substrate –  It is recommended to carefully sand the marked area by hand to avoid “sanding through” the cathodic dip primer.   Seam seals S ...

Refrigerant machine oil
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