A Google search reveals this about an F05 error code...
Waste pipe blockage or pump issue
Issue: Washing machine door will not open / the door can be opened but water remains inside the drum.
Advice: Please check for blockages in your pump filter (if applicable to model – please see user handbook). Also check for any blockages in waste water hose and in any under-sink plumbing. If none of the above solutions work, it is likely you have a pump failure and will need further assistance.
If the fault still remains then we recommend you call our customer service centre to book an engineer on: 0344 822 4224
Good Luck..., June 2016
