I had a bit of a scare this morning. I went down to use my washer so I could do my laundry. I heard a loud buzzing. I opened up and then closed my dryer door. It stopped. I went down again and the buzzing was back. I tracked it down to the electrical box. So I went upstairs and turned off all of my heavy drain electrical items especially an older oil filled heater. The buzzing stopped. I slowly preceded to add on my space heater minus the oil filled one. There has been no buzzing since I took off that oil filled heater.