** 18.5 cu. [Kenmore refrigerator] ** I'm afraid that is not enough information to identify the appliance in question. What is needed is its exact model number. You can find tips for locating the model and serial number identification tag on your appliances at the following link: - Model Number Tag Search LINK > www.appliance411.com/parts/tagsearch.cgi ** making a buzzing sound then a pop. ** From where on the fridge exactly? (see the following link). - My refrigerator is making strange sounds. What is wrong with it? LINK > www.appliance411.com/links/jump.cgi?ID=768 ** The freezer goes into defraust all the time. ** It is actually going into "defrost" (see the following link) or just not cooling??? - How does a frost free refrigerator's defrost system work? LINK > www.appliance411.com/links/jump.cgi?ID=658 If it is just not cooling, resulting in thawing and the sound you're hearing is from the compressor, there may be a problem with the compressor or its starting device. You may need to have a service technician check to see which. JMO Dan O. www.Appliance411.com/parts/?ref411=Kenmore+Fridge The Appliance Information Site =D~~~~~~
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