Things That Are Normal With Your Microwave Oven - GE JES1139 Owner's Manual

Troubleshooting tips.
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Things That Are Normal With Your
Microwave Oven
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Steam or vapor escaping from around the door.
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Light reflection around door or outer case.
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Dimming oven light and change in the blower sound
at power levels other than high.
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Dull thumping sound while oven is operating.
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TV/radio interference might be noticed while using
the microwave. Similar to the interference caused by
other small appliances, it does not indicate a problem
with the microwave. Plug the microwave into a
different electrical circuit, move the radio or TV as
far away from the microwave as possible, or check
the position and signal of the TV/radio antenna.