How can I fix my Bosch fridge freezer Non frost free Bosch Classix?

i have just replaced the module control and light switch on my fridge freezer but still have a problem when i turned the fridge on it starts and runs for 12 to 16 hrs it then stops and wont come back on again until the fridge has defrosted. I then have to manually switch it back on.
I was told it was the module control but it seems not. When it is on the bottom shelf in the fridge at the front of the fridge gets a little warm. The freezer is 9 years old model no KGV3104
any ideas would be helpful