I'm very sorry for any inconvenience this may have caused you. Unfortunately, this sounds like it may need servicing. Here's the thread where you can get details on setting that up: http://forums.cnet.com/7723-13973_102-542437/service-issues-click-here-for-help/
My freezer has started making funny noises and not freezing my food. One minute the temperature is -20 then the next it is down to -4 and then takes forever to get back to -20. The code number is SR-L629EVSS any ideas?