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Microwave is arcing If you see arcing or sparking inside a
microwave, turn unit off immediately. Arcing can be caused by having
something metal in the oven cavity touching a side, an oven shelf is
touching the side of the cavity, an oven shelf support has broken,
microwave waveguide, or bad magnetron.
If your microwave has a
shelf in it, and you do not use it, keep it out. If one of the shelf
supports breaks or comes out, the microwave will arc where the support
was. You will have to sand the spot down, paint with appliance paint
and re-install support. If the shelf shifts on the support and touches
the side it will arc.
Your magnetron waveguide will either come
out of the top, or side of the oven cavity. Some will have a stirrer in
it(mostly top waveguides) with a panel over, or just a cardboard type
cover over it. Over time, the stirrer cover can become warped from the
heat which will expose the stirrer's metal shaft which will then cause
sparking. These covers and stirrers come in a kit and can be replaced
from inside the oven cavity.
Your cover over a side waveguide is
coated with a substance on it, and overtime this coating can come off
from the heat and moisture in the microwave. These waveguide covers are
very easy to replace from inside the oven cavity. Touch up any paint
that may have chipped or come off because of the arcing.
If your
waveguide cover and/or stirrer are all OK, then the spark is coming from
your magnetron. The antenna on your magnetrom has overheated and
burned, sending the microwaves out at the wrong angle. If you catch
this microwave oven repair early enough, you can usually get by with
just replacing the magnetron. If the arcing has caused servere damage
inside the waveguide, you will need a new microwave. Waveguides are not
replaceable and most you can barely see into them, let alone sand and
re-paint. In this case of microwave oven repair, when you remove the
magnetron, you will see the burned antenna, or your magnetron will fail
the test bel
SOURCE: microwave ovens
The cover is probably the magenetron. That is where the microwaves come from. If the bread was moist, it might have left condensate in the unit which is causing the sparking. Unplug the unit, leave the door open over night. If you can remove that cover, do so. Be sure to carefully replace it before using the unit. Never turn on a microwave with nothing in it.
SOURCE: Sylvania microwave
my new microwave sylvania beeping, some times i have to unplugged to reset them,can you give me a soluition,please?
SOURCE: microwave ovens
The job of the waveguide cover is to protect the waveguide (opening) and the magnetron from buildup of food particles and grease. When the grease and food particles build up on and below the cover, they will carbonize and arc - and maybe even flame up! The solution is to clean it and keep it clean - but if it's too dirty, it must be replaced. Sometimes it's necessary to remove the cover to clean both sides of it, and to clean the edges of the opening it covers. It is held in place with a small plastic rivet (or screw) and once that is removed, the cover will slide over a little then drop down. Be VERY careful not to get cut on the potentially sharp edges of the opening, and do not spray anything into the opening. Apply an alcohol-based cleaner (such as the purple kind) and /or gentle scouring powder to a cloth or paper towel and carefully wipe it out, then when it's dry, reinstall the cover and the rivet. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the amonia will crack and distort polycarbonate plastics.
SOURCE: microwave ovens
The Magnetron has failed, causing the waveguide to become damaged. If the waveguide is damaged/burned the microwave can not be repaired and should be replaced.
SOURCE: The top plate inside the microwave sparks while
The wave guide could be dirty or damaged. Dirty oven interior can also cause sparking. The wave guide is probably not dirty if it's not on the interior of the oven . Some are behind the interior wall .
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