The temperature control light is flashing

your probably not going to like this answer but... it is best to fully defrost it as it may be ice on one of the sensors the defrost system cannot clear. clue= Layer of ice on back fridge shelving.
Turn it off/unplug it! let stand for at least 8 hrs with doors ajar.
or if you want to unplug remove contents and warm up interior for a hour or more with a hair dryer.
have a sponge or towel handy for wiping water from the bottom. don't put dryer on bottom it may get wet and short. Not good. check rear and sides if they are still cold/cool keep dryer running for 30 min more or so.

By turning it off you just reset the PCB and if it is ice on the evaporator or sensor it will not be working correctly and show as an intermittent fault...flashing light.
Hope this helps you a little. your probably not going to like this answer but... it is best to fully defrost it as it may be ice on one of the sensors the defrost system cannot clear. clue= Layer of ice on back fridge shelving. Turn it off/unplug it! let stand for at least 8 hrs with doors ajar. or if you want to unplug remove contents and warm up interior for a hour or more with a hair dryer. have a sponge or towel handy for wiping water from the bottom. don't put dryer on bottom it may get wet and short. Not good. check rear and sides if they are still cold/cool keep dryer running for 30 min more or so. By turning it off you just reset the PCB and if it is ice on the evaporator or sensor it will not be working correctly and show as an intermittent fault...flashing light. Hope this helps you a little.