Assuming that this post relates to your earlier post in this forum, the wash thermostat is located in a plastic holder on the elbow of the hose from the sump to the circulation pump, under the machine. It is unlikely to give the sympton described earlier as it is 65c normally open. Stat failure would lead to an overheat condition.
Anyway, part number is 4819 282 48198 at around £10 + VAT + p&p
I should point out that this range of dishwashers were notorious for breaking the wiring loom in the door at the pivot point.
Do nothing without pulling the plug first. :plug:
If you are not confident in your abilities, get professional help. You can either pop your postcode up in here, or check the Directories section for a UKW engineer in your area.
Regards,
Penguin45.