My KitchenAid refrigerator runs continuously and gets very cold, whichever setting I use.

I checked the coils and they are clean. I also changed the thermostat for a new one. I checked and the seal is good and the light switch is in the proper position.

Here is what happens:
- Refrigerator runs continuously and temperature is colder than what I need, despite the setting being on the highest temperature
- If I switch off the refrigerator using the temperature control to the "off" position, and then switch it back on, then the cooling system does not start.
- Once the refrigerator starts warming up (after several hours), then the cooling system starts again and will not stop.

I am tempted to buy a timer which will program the refrigerator to switch off every so many hours but I would rather find a proper solution to the problem. Any suggestion?

It's a refrigerator only - no freezer section. I checked the temperarature with a refrigerator thermometer and it shows 30. I am not convinced of the accuracy so I am going to try again with water.

Ok, all evidence points to a sticking cold control 4344725 You can try spraying the control with non-residue contact cleaner available at Walmart, just turn the control while spraying.

Just spray the control, it helps to use the red tube that comes with it so you can direct it at any tiny opening in the control.