zanussi ZWD16270W1 dryer not working?

when dryer function is selected the machine registers the correct function and time and begins perfectly correctly. However after 5 to 10 mins the machine will switch itself off displaying that the full drying cycle has been completed. No heat has been generated and consequently no drying has taken place. No error codes are displayed as according to the machine no error has taken place. Any thoughts on how to solve this? Many thanks