Refrigerant Circuit, Specialized Repairs

Refrigerant Circuit, Specialized Repairs

• For information regarding performing repairs on vehicles with air conditioning and working with refrigerant, refer to => Refrigerant R134a.

• Information on tools for repairs in vehicles with climate control system can be found in => Refrigerant R134a Servicing Special Tools.

• Under certain conditions, the dryer cartridge should no longer be replaced each time the refrigerant circuit is opened.

Danger due to refrigerant coming out under pressure.

Danger of frost bite to skin and other parts of the body.

• Extract the refrigerant and immediately open the refrigerant circuit after that.

• If the refrigerant was extracted more than 10 minutes in the past and the refrigerant circuit was not opened, extract the refrigerant again. Pressure in the refrigerant circuit is caused by evaporation.

• 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 (for example, 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 (for example, noise or no output).

• The procedure for flushing with refrigerant R134a is described in Refrigerant Circuit and Components under => Refrigerant
R134a.

ELSA contains information regarding performing repairs on vehicles with air conditioning and working with refrigerant.

Information on tools for repairs in vehicles with climate control system can be found in ELSA.