is it clean water or dishwater?
if clean water is in machine, a seeping fill valve on machine could be cause and would need replaced. Switch off water supply overnight to see if it stops..
If dishwater(dirty) is in machine then plumbing of waste drain hose could require attention.. water could be back flowing from sink waste into machine..
Most machines have a non return flap on the drain pump to stop the latter from happening so I would suspect valve as primary possibility unless non return flap is tuck open..
anon2
July 2007