Cleaned Miele filter now it leaks

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Miele washing machine leaked after filter was cleaned and refitted

The problem

The washing machine did not leak previously, but after the filter was removed for cleaning and screwed back in, a maintenance wash caused water to leak onto the floor.

Likely cause

The strongest supported diagnosis is that the filter was not sealing correctly after refitting. The accepted advice suggests either the filter was not seated properly, or debris such as cotton or undissolved detergent was trapped on the rubber seal or sealing face.

What fixed it

Remove the filter again and inspect how it seals in place. Clean the rubber seal or flange and the mating surface inside the pump housing, and check that the seal is not twisted, distorted or obstructed before refitting. The exact repair was not confirmed in the discussion.

Checks to try

• Filter was reportedly screwed up tight after refitting
• Check whether the filter has a rubber flange or rubber seal
• Inspect the rubber seal for dirt, twisting or distortion
• Inspect and clean the sealing surface inside the pump housing
• Check for strands of cotton or undissolved detergent on the seal