Volkswagen Workshop Manuals
Passat Sedan V6-3.6L (BLV) (2008)
Maintenance > Fluids > Refrigerant > Component Information > Description and Operation > A/C System, Repairing and Handling Refrigerant > Page 1534
Refrigerant: Description and Operation
Refrigerant leaks out if refrigerant circuit is not discharged.
Refrigerant must be extracted before opening refrigerant circuit. If refrigerant circuit is not opened within 10 minutes of extraction,
‹› Under certain conditions, the dryer cartridge should no longer be replaced each time the refrigerant circuit is opened.
‹› Flush the refrigerant circuit with R134a refrigerant under the following conditions:
‹› In the event of dirt or other contamination in the refrigerant circuit.
‹› If vacuum reading is not maintained on evacuating a leak-free refrigerant circuit (pressure build-up due to moisture in refrigerant circuit).
‹› If refrigerant circuit has been left open for longer than normal (e.g. following an accident).
‹› If pressure and temperature measurements in the refrigerant circuit indicate the likelihood of moisture
‹› If it is not clear how much refrigerant oil is in the refrigerant circuit.
‹› The A/C compressor had to be replaced due to internal damage (e.g. noise or no output).
‹› The flushing procedure is described in the repair information.
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