Dishwasher filling up

[DaveOC]

The bottom of my dishwasher slowly fills with water even when turned off at the mains, then the pump switches on and won't turn off. The drain and pipe are clear as far as I can see, any help or ideas??

 

[footprints]

When you say turned off at the mains I assume you mean no water to the appliance. If so the only place water can come from is the waste, is it plumbed into the sink trap? If so it may be syphoning back into the machine when the sink is used.
There is often a non return device in the connection which may be stuck and as a rule the waste hose must rise to a height above the level where it enters the sink trap and drop down to the connection, to stop water running back.

Hope that makes sense

 

[JohnD]

did you mean the water turned off, or did you mean the electricity turned off?

where was it turned off?

is the water clear and perfectly clean?

 

[DaveOC]

The water is turned off at the stop cock so no water should be going into the machine, the power is still on and the water looks slightly dirty.
Over night the machine did not seem to fill but during the day it has, I'm wondering if your right about pulling water in from the sink waste as we used it during the day, if this is the case what needs to be done. Its a Miele about 6 years old and its integrated. Many Thanks

 

[footprints]

Looks like some Miele dishwashers have an integral non return valve (many appliaces rely on one where the connection is made to the sink) try this link to a pdf file scroll down to page 54 and take a look.

http://www.google.co.uk/url?sa=t&rc...=Y69vb29KzBngVijcyW6dyw&bvm=bv.58187178,d.bGQ

 

[JohnD]

look at the waste hose where it connects to the sink trap.

It must loop up so the top of the loop is higher than the water level in the sink when it is full. This can be done by clipping or tying the hose to the underside of the worktop, or by leading the hose through a hole right at the top of the side wall of the sink unit.