Is this burning smell occurring during a defrost? Something, like a food particle or wrappping, could be burning while in contact with the defrost heater. Is the burning smell coming from within the freezer? If it is coming from the outside and back of the box, unplug the box and investigate, or call a technician. You may want to call a technician, anyway? We don't need house fires.
Check out the wiring. There might be corroded insulation which may cause a short. There is also a box at the back of the fridge which contains relays, see if the smell comes from there. It could be still be caused by exposed conductors. If all check out ok, it may be the motor. These are the only common things that need to look out for similar concerns.
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It is not from a defrost, it just started this afternoon and it is from outside the fridge, at the back (like burning plastic). We are going to call for service, I was just wondering if anyone was familiar with this problem and I might have an idea of what to expect when the tech comes. Thanks for the help!
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