Zanussi DW927 Dishwasher stops after filling with water..Help!?

I have a zanussi DW-927 Dishwasher.
When I start the dishwasher the pump to empty the water starts then stops. It then starts to fill with water and the spray starts up. After 20sec. it all stops and you can here it start to fill with more water, It then completely stops.
I can here at this point something buzzing and a quite hum from the washer.
When I open the door it just has a pool of water in the bottom and the only way to remove the water is to put it onto drain. (the water is cold inside)
I have put the washer onto the drying program and the element comes on gets very hot! Don’t know if this bit is correct as I don’t normally open the door at this point.
I think it could be the thermostat can anyone help? I have woman moaning at me!