GE (PSS26MSRSS) Side by Side Refrigerator "tfx20" Questions

My GE side by side TFX20 is not cooling on Refrigerator or freezer. Hear the fan running but not the compressor. Is it a bad Run capacitor or compressor? How do I test? Hi, Many times a freezer and/or

my tfx20 fridge, keeps icing up in the freezer. changed timer and defrost thermostat. no help. the fridge does stop on the set times on the timer but never defrosts. Fan is on constantly, no leaks ...