Frigidaire Refrigerator is warm on top of the frig and freezer but fine on bottom.

Hi,

Initially, Pls confirm the model number of your unit.

Alternately and assuming that the freezer is working as expected and it is only the fridge that has an issue. A few basic/working ideas:

• most designs call for a single compressor to cool the freezer;
• the cold air in the freezer is drawn towards the fridge to cool that area;
• this is performed by a fan drawing air in the freezer through the evaporator;
• most would have a vent or air pathway to guide the freezer air;
• all would have thermostatic control to set the desired temperature;
• some designs have two thermostatic control , 1 for the freezer, 1 for the fridge.

• compressor is working since freezer is OK;
• pls verify that the fan is turning drawing air from the freezer side to the fridge side;
  
• additionally check that the air is strongly blown into the fridge area;
• a little experiment, open the fridge door, look for and press on the door switch, the light should go out, after a lengthy seconds, the fan should trigger on, not only would it be audible, you would notice the frozen air swirling inside the fridge area. If you hold on long enough to the dorr switch, the compressor should kick in (if it is not already running) since the thermostat of the fridge area (if one is present) would sense that the fan is turning but the fridge area is not cooling.
  

Remove the rear lower panel on the unit check to see if the compressor is hot or if its running, should feel the vibration, also listen for any clicking noises.