it definetlry sounds like a blockage between ur sink,does not sound like a blockage in the washingmachine,so if u do go and buy a new machine u will have the same problem
yeah what cakeman said but failing that and u still cant get it open u may have to smack the door pekka or catch,but if u put ur hand on the doorock after u have unpluged it and try and push the catch either way it should open
check your brushes first the situated on ur motor they have 2 screws normally.but to me it sounds like ur motor they are a common fault on the hoover,especially the older makes