Front wipers not working?

My wife started her Micra this morning after a heavy frost, the wiper control was set to automatic and therefore the wiper motor was unable to operate due to being held by the ice. She switched the wipers off as soon as she realised but after the screen had been fully defrosted and the wiper blades released they have failed to operate. Does this mean that the motor is now burnt out or that a fuse might have gone. If the fuse could have blown where can I find it in order to replace it. Any suggestions please.