Glass door fridge shooting heat instead of cold

I have a glass door fridge, the type that is used in small stores. It was unused for the whole winter, and I have plugged it back in. I have made sure that the thermostat is set to 4-5 (out of 9) but for unknown reason it is shooting heat instead of cold. I can send pictures of the unit and the compressor if need be. I really appreciate any tips that can solve this problem
tks

Is there a condenser fan?

If yes is it working?

Any defrost heaters stuck on?