Seat Leon >> Removing and fitting the evaporator


Danger from refrigerant escaping under pressure! Freezing of skin and other body parts.

  • Evacuate the refrigerant and then open the refrigerant circuit immediately.
  • If more than 10 minutes have elapsed since evacuation and the coolant circuit has not been opened, evacuate the refrigerant again. Pressure builds up in the coolant circuit as a result of secondary evaporation.



  • Remove heater and air conditioner unit.
  • Remove fresh air blower - V2-.
  • Remove the air intake housing.
  • Remove the hollow bolts -1-.
  • Release retaining clips -4- and -5- -arrows-.
  • Detach the top part of the evaporator housing -3- from the bottom part -2-.

Air conditioning system

  • Pull the evaporator -2- out of the bottom part of the evaporator housing -1-.
  • Unscrew the expansion valve.
  • Detach the seal/insulation -3-. To do so, pull aside the movable part -5- -arrow-.
  • Detach the locking element -4- for the refrigerant lines.


Install in reverse order of removal; note the following.

Air conditioning system

Note Even minute leakage at the tongue-and-groove joint between the top and bottom part of the evaporator housing can lead to whistling noise as a result of escaping air. For this reason, lubricate the connection points lightly with silicone grease or similar to completely seal the connection points. For silicone grease.

  • Refill with refrigerant and refrigerant oil.
    Assembly overview - evaporator housing
    Note There are different designs and makes of heater and air conditioning unit. The individual components of the various heaters and air conditioning units are similar but not identical. The ...

    Cleaning evaporator
    Special tools and workshop equipment required Ultrasonic cleaning unit for the air conditioner circuit - VAS 6189B- Cleaning liquid - VAS 6189/1- Suction nozzle - VAS 6288- Commercially av ...

    See also:

    Removing and installing sliding sunroof adjustment control unit - J245-
    Removing Remove lighting elements and front control unit . Loosen bolts -2-. Remove the frame -1- in -the direction of arrow- out of the moulded headliner. Loosen bolts -2-. ...