I've had the kegerator below for about a year and recently it started making a strange somewhat grinding noise. It has no impact on cooling. It started doing it about once a day a couple weeks ago and it has now become more frequent, probably every time the cooling cycle kicks in. The best I can tell it's not coming from the compressor and sounds like it is coming from inside the fridge itself. I don't know a ton about these things, are there common items to check? thanks for any help.