Miele T7944c keeps going to "0" problem

[Jpk]

Hello. 

I was wondering if somebody can help. We have a Miele t7944c honeycombe care tumble dryer. 

All of the settings bar 2 , works for 1 minute and the the display goes to "0" as if the cycle is finished. But is hasn't it's only been on for 1 minute. 

There are 2 cycles that work and that is the 4 minute cycle for "wool delicates" and that seems to work fine and heat up. The 15 minute cycle sometimes goes for the full 15 minutes but usually doesn't. 

I have checked all the filters and cleaned them of any fluff removed the rear panel and cleaned there.

i have been reading up and maybe it's a sensor? But don't want to be replacing parts if I don't need to. 

Thanks  in advance for any advise.