In article ,
dog-man writes:
I have a new Hotpoint washer / dryer. It's only about a month old.

Before I shout at the supplier, has anyone any ideas why after use and
being empty (dry), it will gradually fill up with water even when
powered down.

Could it be a water pressure problem?

I have had several washing machines / dishwashers in this house and
never had this problem before.

Inlet valve letting past is most likely as others have said.

Another possibility is the waste plumbing. If it's been done
incorrectly, you might have the sink and/or other waste
entering the machine via the waste hose. This will usually
start to pong eventually as it's not clean water.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]