Dishwasher Whirlpool - ADG7340

[Keefstank]

This is a built in appliance with no lights etc visible from outside.

The DW begins it's cycle and fills with water and then about 2-3 minutes in (at the point I assume where the rotating sprinklers should start?) there is a fairly loud continual buzzing and nothing else happens. I have tried different temperatures, cleaned the filter etc but the problem persists. I am at least able to re set the machine which then drains the water away. If it's of any help the first time this happened I noticed that the water was warm indicating that it was being heated.

Any help appreciated.

Thanks

 

[Sleepyhead]

Blockage in the wash pump, faulty wash pump motor, faulty capacitor if fitted.

 

[Keefstank]

Thank you for your quick reply Sleepyhead.

Now for the silly question; is the pump located at the back of the machine and would I need a qualified engineer if replacement is required?