We had this problem, and in the water outlet pump, i.e. when it is rinsing, I found an elastic band wrapped around the propellor or whatever it is called, its and easy repair, just make sure you unplug it first and remember where any cable come from, use a camera if you have to. reomve the pump completely from machine and strip, it only has 3 screws.
Will Stirling
May 2009