Maytag side by side 23.6 cu. ft.

Question

I have a side by side that is only cooling in the main compartment to 54 degrees. The freezer side is working very well. Everything is still frozen. This just took place over the last couple of days. I have cleaned out underneath thinking that it might have been too dirty. The compressor is still working...sounds ok to me although it felt pretty warm.

Any ideas?