Washing Machine Fills With Water Overnight

[Curious]

I have a four year old washing machine. My problem is that if the machine is left idle for over 12 hours, it is frequently filling with foul water. I suspect that there may be a blockage somewhere related to lint & dog hair, so my question is;

Where is the blockage likely to be, and can I access it? Are there any other likely causes for the "back-filling"?

[Whitegoodshelp]

It's most likely to be water from the sink siphoning into the washing machine. Does the water from this washing machine pump out to a connection on the U bend under the sink?

If so, make sure the drain hose is tied up in such a way that water from the sink doesn't have a direct run down the drain hose into the washer. It should have to go uphill at least 4 inches. This would make it impossible for water to trickle down into the washing machine.

The only other thing that causes water to seep into a machine overnight is a leaking fill valve - but this would be clean water and not foul. ( Related: Washing machine fills with water overnight or when not in use )

[Curious]

Thanks! We had a fiddle with the drain hose and the problem has proven completely solved!

Thanks again (I had no idea it would be so simple)