Depending on the installation site it is necessary to clean or replace the fan. First, remove the grid as described above and proceed as follows:

1. Loosen all 4 fastening screws which are used to fix the fan

   
   
   
   
   

2. Pull out the fan towards the front.

3. Unplug the cable connection.

4. Clean the fan or insert a new one.

5. Connect the cables of the fan and the cables of the computer with the cable connector.

6. Insert the fan again.

7. Fasten the fan with the 4 srews at the housing.