In article ,
Lobster writes:

As I've just resorted to calling out an engineer to sort out the machine
(cough, spit) I thought I'd report back on the outcome for the benefit
of anyone else similarly afflicted... the guy pulled off the front of
the machine and disconnected a flexible hose which led into the sump,
through which the water circulates throughout the wash. It was totally
clogged up with gunge; once that was cleaned out the machine is working
like new.

Don't you just *hate* it when that happens? Oh well, at least I'll know
how to d-i-y it next time it occurs.

There is some type of grease which dishwasher detergent fails to
dissolve, and it does build up in the pipework eventually blocking
it. You can avoid this by either running the machine with a
dishwasher cleaner occasionally, or by adding one drip of washing
up liquid to each wash, which does dissolve this mistery grease.

--
Andrew Gabriel