Miele TWJ 660 WP Operating Instructions Manual page 63

Cracks, tears, indentations
Fluff will blow into the heat exchanger
through cracks and tears. This will, in
time, cause a blockage in the heat
exchanger.
Problem solving guide
White residues or residues of other
colours
These residues arise from laundry fibres
and traces of detergent components.
They can be found on the front and side
edges of the plinth filter. In extreme
cases, they can form stubborn crust.
Residues are a sign that the plinth filter
no is longer a snug fit at the sides, even
if it appears to be perfect:
fluff is getting in unfiltered at the edges.
Reactivate the plinth filter. If these
residues appear on the plinth filter again
soon after cleaning, the plinth filter must
be replaced.
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