Refrigerant Circuit Repairs
There is a danger of ice-up.
Refrigerant leaks out if refrigerant circuit is not discharged.
Refrigerant must be extracted before opening the refrigerant circuit. If refrigerant circuit is not opened within 10 minutes of extraction, pressure may form in refrigerant circuit due to evaporation. Extract refrigerant once more.
Information on repairs in vehicles with a climate control system and on handling refrigerant can be found in A/C SYSTEM .
Information on tools for repairs in vehicles with climate control system can be found in Special Tools .
Under certain conditions, the dryer cartridge should no longer be replaced each time the refrigerant circuit is opened. Refer to REPLACING RESERVOIR/FLUID RESERVOIR OR DRYER CARTRIDGE, CONDITIONS .
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 (such as noise or no output).
The flushing procedure is described in REFRIGERANT CIRCUIT AND COMPONENTS .
Information for repairing vehicles with air conditioning and working with refrigerant can be found in A/C SYSTEM .
Information for special tools and equipment when repairing vehicles with air conditioning can be found in Special Tools .