Can you give me the full model number and also the pnc which is on the rating label inside the door frame.
OK when the appliance fails to finish does it have any alarms in the display at all eg E30 or if you model doesnt have a display any leds lite.
OK the first area that I would be looking is at the radio filter or suppressor unit that is directly to the power cable just under the top of the appliance it looks like this -- http://www.partmaster.co.uk/use-dst3792740007-suppressor/product.pl?pid=1892224 -- look for melted terminals or heat damage to the casing of the suppressor.
The site is manned by engineers that try and help people repair their appliances without calling in an engineer. Depending on the competence of the customer we can usually rectify the fault or if not at least tell you what is the problem and then you can take it from there - Ian