tumble dryer - VERY hot rear of machine - creda t622cw?

creda t622cw --condenser tumble dryer

hi - my tumble dryer is VERY VERY hot on rear of machine where the heating element is - also smells a bit of burning. just noticed that timer is 'ticking' - but drum not turning. checked thermostats - ok .. checked belt - seems to be intack & not loose
Any ideas ??????? cant afford to buy a new one !!!!!
thankxxxx