Beko CDA648FW/1 fridge freezer running all the time....

Hi there... I have just came across this site because i have the above fridge freezer thats running all the time and not switching off...

The freezer is working fine with -20 temperature but the fridge is way to low with -11 and freezing my beers!! I have changed out the small adjustable control board that sits up on the roof of the fridge and the main control board at the back of the unit at the top left as you stand in behind it...

There is no defrost time and no thermostat either as such so must be controlled from the main board at the back of the unit...

I have a bi metal thermostat to fit but i havent a clue where the old one is... Anyone?

I cant be gas... As both fridge and freezer are way below temperatures... And compressor must be okay...

Any ideas why it isnt switching off? And appollogies for being my first post!! I will try and help others if need be...

Thanks... Andy