Aeg lavamat 16820 dryer not working?

Hi, my AEG Lavamat Turbo 16830 and the dryer function is not working properly. It starts but counts down thnrough the minutes too quickly (between 15-20 seconds per minute counted down) and stops part way through before reaching the end, usually after about 5 minutes running time only. It also doesn't seem to be heating up to dry at all. The washer function seems to be working fine.