For Cars Within VIN Interval

T2037750 - W2019950 (3D/5D) and
T7010027 - W7008292 (CV):

- If the antifrost thermostat clip is metal, change to a new antifrost thermostat with plastic clip.
- Change the thermostatic switch on the compressor.

A description of the expansion valve and compressor can be found in WIS.

A. Make sure the A/C pipes are not touching the body, especially under the battery tray.

- Adjust the pipes so that they are free of the body.

B. Change expansion valve, see WIS.

If the problem persists. continue with C

C. Check the bearing play with the compressor clutch unladen. Remove the belt and check the runout and bearing play.

If there is play in the bearing, remove the clutch and see whether the shaft from the compressor rotor has darkened (run warm) and if refrigerant is leaking from the shaft.

- If there are neither signs of the shaft having darkened nor any leaks but only play in the bearing, the clutch must be changed.

- If the shaft has darkened or if there are refrigerant- leaks, the compressor must be changed. See WIS.

Note:
Most cases of compressor breakdown are caused by the expansion valve or antifrost thermostat.