my dishwasher, about half an hour after being switched on starts beeping continously and on opening is lit up at what appears to be the rinse mode (a picture of a shower) the start button is also flashing intermittently. the dishes look rinsed but not entirely clean and the machine is only slightly warm.
the machine is 4 years old.
i have rinsed the filter and switched the machine on an off andtried running it through another cycle.
please help.

caroline tanner, December 2010