I had the problem that's well documented on the WWW as "bosch
dishwasher stuck on 1" or "stuck in drying cycle", and found the
failed solder joint on one of the PCBs in the control module. Based
on the comments that resoldering it is just a temporary solution, and
on my lack of experience soldering PCBs, I decided to replace the
control module. The dishwasher now works --- to some extent.

This model has the following controls on the door:

+------+
| |
| 188 |
| | O O O O
+------+
+-----++-----++-----++-----++-----+
| || || || || |
|delay|| auto|| eco ||quick||pre- |
| || || || ||rinse|
+-----++-----++-----++-----++-----+


"188" is the LED that shows the remaining time or the delay in hours;
"O" marks the red LEDs to indicate the programme selected; and the
remaining boxes are the buttons.

Previously, each button (other than delay) would select a programme
and deselect anything else (so there's always exactly one red LED when
it's set to run). The auto, eco, quick, & pre-rinse programmes took
around 130, 140, 40, & 20 minutes (respectively) to run.

Since I replaced the control module, "quick" and "eco" are both taking
about 2 hours, "pre-rinse" comes up with "27" on the display (but I
haven't tried letting it run to see what it does), and the "auto"
button toggles its LED without switching the other programme off (I
haven't tried letting it run this way to see what happens). The delay
timer works normally. In summary, the controller is behaving as if
the dishwasher had a different set of options from the labels on the
buttons. The "combination" functions for resetting a running
programme, toggling intensive drying, and adjusting the water softener
setting all work properly, using the same button combinations as
before.

The part number on the box (SET-489607) is the right one for a large
number of Bosch models including mine (SGS4468GB/35); I didn't have
any trouble swapping the module in; and there aren't any plugs or
sockets left over. I also opened the door back up and double-checked
that all the plugs were properly plugged in and matched the digital
photo I'd taken before taking the old module out (although I don't
think they can be plugged in out of order anyway). The shop I ordered
the part from (which also does repairs) said there isn't any procedure
to set the module for a specific module.

Any suggestions?