Whirlpool Fridge Not Getting Cold, Fan+Compressor Running

About a month ago I replace a burnt out control board on our Whirlpool fridge. It was fine for several weeks, but now neither the fridge or freezer will cool. I replaced the start relay and cap on the compressor, and can see that both the fan and compressor are running. I measured the terminals on the compressor at 4, 6, and 10 ohms. Something odd is that the area between the fridge french doors seems to be getting very warm. Any ideas what could be wrong?