fridge cool, freezer cool

Help again, just noticed the fridge is about 60 and the freezer probably 50. the coils have a small amount of frost. The freezer fan above the coils is not running and I do not hear the compressor. Unplugged for a minute then plugged in, no change. FYI…Changed out the defroster and t stat a few months ago with a successful fix. What now. Thx, Steve