I have a westinghouse upside down fridge BJ504QR that is making a gurgling noise quite often. The fridge temp will move from 4-6 deg up to 8-10 but not all the time. The freezer is working ok and the motor does kick in & out. I am just worried about the gurgling and wondered why it is making this noise and should I get a repairman to have a look at it as it is about 10-12 years old. Thanks Tracey