Bosch WFL 2050 Operating & Installation Instructions Manual page 21

Attach and tighten the pump cap.
Carefullyremovethe pump cap. Attach and close the cover plate.
To avoid unused detergent from flowing into the
drain during the next wash cycle:
Pour 1 litre
/ 1 34 pt of water into chamber II.
Select the Drain program.
Remove any loose debris / lint from inside the
pump and clean the pump. The pump impeller
must be able to rotate.
Clean any residual water or lint from the threads
of the pump cap and pump housing.
21