First port of call: Find the manual. Read it.
No manual? You could have searched for one. Try this: http://www.indesitservice.co.uk/category/laundry/
You could have even searched for the Indesit F10 error code yourself. Took me about 40 seconds to locate this, which may help:
http://www.espares.co.uk/advice/0/2561/identifying-hotpoint-or-indesit-error-codes-
XXX, January 2016
