A:Answer Hi Steve - Thanks for choosing GE Model GWE19JSLSS! If you hear buzzing from your refrigerator, it is most likely coming from the icemaker or water valve as it's trying to fill with water. This would occur approximately every 1 hour to 1-1/2 hours. The buzzing noise would be be heard approximately every 15 minutes (every time the icemaker calls for water). If a water line is not installed, be certain to turn off the icemaker. On models with the XWF filter (many bottom-freezer and side-by-side models), you may hear the sound for 5 seconds about once every hour. It is caused by an isolation valve that is designed to help prevent major leaks from the filter. Again, to keep the buzzing from occurring, make sure the icemaker is turned joff if water is not connected to the refrigerator. Take a look at page 16 of the Use and Care Guide: https://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=49-60805-3.PDF - If you have any additional questions, do not hesitate to ask, we are happy to help at GEAppliances.com! Sue