Diplomat APM 8702 tumble dryer not getting hot but other wise works. ?

I have a diplomat APM 8702 combination washer dryer. The washing machine seems to work ok but the tumble dryer turns but does not get hot. I have cleaned out a filter , which was badly blocked at the bottom of the machine.

Is there a themal cut out that may need resetting and where is it?
is there a seperate filter for the dryer?
where can i get a manual?
Any other ideas