Refrigerant Pressure Sensor / Switch: Service and Repair

64 53 520 - Replacing safety pressure switch





Warning!
Risk of injury!
Refrigerant circuit is under high pressure!
Follow safety instructions for handling R 134a refrigerant 64 50 ... Instructions For Handling Refrigerant R 134a.
Avoid contact with refrigerant and refrigerant oil.
Follow safety instructions for handling refrigerant oil 64 50 ... Instructions For Handling Refrigerant R 134a.





Important!
Risk of damage!
Restart engine only when A/C system has been correctly filled.
Follow instructions for opening and replacing parts in refrigerant circuit!

Note:
If A/C system is opened for more than 24 hours:Replace desiccant insert for A/C system 64 53 515 Replacing Desiccant Insert For Air Conditioning System





Necessary preliminary tasks:
- Drawing off, evacuating and filling the A/C system 64 50 009 Drawing Off, Evacuating and Filling A/C System (R 134a) are not included in the time value given for this work operation!





Disconnect plug connection (1) and release safety pressure switch (2).
Tightening torque 64 53 14AZ Specifications.





After installation:
- Evacuate and fill A/C system 64 50 009 Drawing Off, Evacuating and Filling A/C System (R 134a)