Tournifreak wrote:

Thanks for the suggestions. A quick update: The controller is just a
rotary encoder with a syncro-motor attached. I took out the
syncro-motor and tested it seperately - it works OK. I also cleaned all
the contacts on the encoder. Still the same problem.

ok the power to the sync motor goes through switch contacts on teh
controller, and is routed at times through the temp sensor. So an open
circuit controller switch or oc temp sensor can stop the thing moving.

I took the pcb out
and resoldered any dodgy-looking joints (why is it that domestic
appliances have *such* bad soldering on their PCBs? I work in
electronics and I would never allow a product to ship that has such bad
joints. Do they just use the cheapest board-population company they can
find or what?)

yup

Anyway, still no luck so I've ordered a new Bosch machine in case I
can't get this one working soon. If I can fix it, I'll cancel the
order. And I'll never buy a Hoover - anything - again. (If you read the
google archives, you'll find this is not the first time this machine
has broken down!)

If you get a copy of the circuit diagram you should be able to trace it
thru no problem and see where the power is o/c. Its all basic
electromechanical control.

I'd check for L and N to motor to see which ones missing, check the
water is heating, as programmer wont advance if the element is o/c and
the water doesnt heat, and check the temp sensor isnt oc when the
waters heated.

If I were really pressed for time and just needed it working quickly I
might wire round it, giving time to get a cct diag.


NT