Expansion Valve, Removing And Installing (Front A/C Unit): Notes
Special tools and workshop equipment required
- Engine Bung Set:VAS6122
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.
Certain tools are required to discharge the refrigerant circuit. These work procedures may only be performed by trained personnel. Refer to REFRIGERANT CIRCUIT .
There are different versions depending on the refrigerant (R134a or R1234yf).
After switching off the A/C compressor in this vehicle, it may take a relatively long time for the pressure on the high pressure side to decrease. This is because the expansion valve is cold and the pressure on the low pressure side increases quickly after shutting the compressor off, then the expansion valve closes and the refrigerant flows slowly to the low pressure side.