My G.E. fridge has started to make noise when it goes on that borders on obnoxious. I can even hear it in the middle of the night from upstairs. I was told that the filter needs cleaning but I can't find it. I was also told that the compressor is starting to go (after just three years?)The temperature, however, is fine in the fridge (about 36 degrees) and all is solid in the freezer. Any suggestions before I blow $80 to get G.E. out here?