I agree, it sounds like a blockage to the drain drawer. You need to get someone to open it up and look but I can't see why they have to take it away - sounds like a ploy to make more money out of you. Find a repair 'man' who is happy to check it out in front of you so you can see what's wrong and know you're not being taken for a ride - it could be quite simple and therefore cheap to fix.
Don't hang about though because that water has got to go somewhere and if it isn't going where it should be then it may end up going somewhere it causes real problems!
Richard
January 2009