your wt965 washing machine has a 3 phase module fitted to the right hand side lower rear of the cabinet ,this is the brain of the appliance ,the door lock is controlled by this ,although the door is closed the module still thinks the door is open,
a new module would be needed cost around £90 ,and then it would need programming,your appliance is covered by a 5 year parts cover but hotpoint would charge a call out around £100,
hope this helps
'm', January 2009