Well, freezer and fridge share the same cooling unit, so that's probably working ok. Is the fridge empty or full of food? It's easy to block internal air flow when the fridge is full and the box stays warm even though the cooling fins at the back are cold. There is no fan inside to circulate cold air as in a residential fridge, so it relies on convection to move the cold air to other shelves.
How are the door seals? If you close a dollar bill in the door, is it easy to pul out or do you feel resistence?
There should be a thermistor (temperature sensor) clipped to oneof the cooling fins inside the fridge. Is it still attached? Itwon't work right if dangling loose.