Kohidad, since my freezer gets to -13 degrees (which I think is well below what it should be)do you think it would still be a problem with the fan and outside coils? Everything looks clean (I keep the coils clear with compressed air) and warm air is being moved by the fan when the compressor is on. It seems the ability to cool gets stopped somewhere between the freezer and fridge.
Clean coils and the fan moving air seems to be the outside common issues are okay. By chance has the ventilation for the air to/from the compressor area been blocked by something?
The coils are a single loop so if the freezer is getting cold, the freon is still getting to the fridge compartment. Otherwise nothing would work if there is a blockage not to mention it would be very unusual.
How are you checking the temperature?
Have you ever checked the temps before? Are you checking them in the same way? If not this is something you may not have noticed.