Expansion Valve, Removing And Installing: Notes
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. If the A/C compressor is switched on, the pressure on the low pressure side goes down, the expansion valve open and the refrigerant can flow of the low pressure side.
There are different versions of the expansion valve depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
From the start of production through the changeover from MY 2012, evaporators approximately 40 mm wide (block depth) -A- are being installed (air conditioner part number "8K_ 820 005"). From MY 2012, as a running change and depending on the vehicle version, an approximately 50 mm wide evaporator (block depth) -A- is being installed (A/C unit part number "8T_ 820 005"). Pay attention to the correct allocation of the expansion valve to the evaporator (there are different versions). Refer to the Parts Information.
There is a label -A- on the outside of the A/C unit with a part number -B- that tells which version is installed. Refer to the Parts Information.
The part number -B- on the label -A- can be read, for example, when the CD changer is removed (depending on the vehicle equipment level). Refer to DVD / CD CHANGER .