I had a loud noise from my Indesit when it was emptying and looked on this site for advice. Rich and Netrix are quite right, I took the front-bottom panel off, undid the cicular pump cover, it was a bit tight so we used a can opener as a large screwdriver, and removed the blockage. We fixed the problem and made £1.03 (the blockage) on the deal.
Richard Finn, November 2005