Troubleshooting tips.36Consumer Support Troubleshooting Tips Operating Instructions Safety InformationThings That Are Normal With Your Microwave Oven Steam or vapor escaping from around the door. Light reflection around door or outer case. Dimming oven light and change in the blower sound at powerlevels other than high. Dull thumping sound while oven is operating. TV/radio interference might be noticed while using themicrowave. Similar to the interference caused by other smallappliances, it does not indicate a problem with the microwave.Plug the microwave into a different electrical circuit, move theradio or TV as far away from the microwave as possible, or checkthe position and signal of the TV/radio antenna.