My ~4 yrs old 1000 watt microwave oven has started a nasty habit of acting like an arc welder every 5th time we run the unit (or so).
I removed a cardboard cover on the right-hand inside wall to reveal a metal cylinder with holes in the end that seems to have a burn hole in the top.
It looks like if I had a new cylinder things might work well. Is it time to throw it in the trash?
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Re: lightning inside microwave oven
You better be carefull my friend or you will start glowing in the dark!! LOL Just kidding. But I wont kid about how dangerous that metal cylinder can be with the holes in the top. Thats the magnatron. It has very high voltage going to it and you should never ever touch any wires going to it even if its unplugged as theres a capacitor in there that holds a charge for a time. f the oven is over several years old, Im sure the magnatron will cost more then a new oven, after you add labor and such. It just migfht be time to upgrade to a new microwave?? Good Luck
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If the microwave oven is 10 years old then it is time to consider a new unit, by your description it is going into cascade failure where different parts have stopped working, the buzzing sound is the magnetron warning you, it is about to fail. The fans job is to keep the magnetron cool while it is running.
The metal shelf that comes with most microwave ovens must NEVER come in contact with any surface of the cavity wall or arcing will occur. (this is why its is mounted on plastic clips). IF you are not using the shelf to cook multiple items (as most people don't)....Remove the shelf and store somewhere else until needed.
There is a good possibility that microwave energy is leaking near the magnetron tube, or some other high voltage electrical problem is occurring. I would recommend having it tested by qualified microwave repair technician. A few things you can do.... -Make sure the door seal is clean and no corrosion. -Check the interior for rust spots or holes and make sure it's clean inside.