how to fix washing machine?

It's possible it's not pumping out water quick enough. You may have blockage in filter? Be careful as machine is full of water so you may flood kitchen. This company has helpfull advice on how to do this on website https://www.local-appliance-repairs.co.uk Goto the help section and look for filter cleaning. Also have you checked that you don't have a blockage at end of waste pipe under sink? Check this also.

David
February 2016