Question about Sharp KB-4425LW Insight Pro Electric Range, White, Active LCD Touchscreen for microwave and lower oven, Electric glass ceramic cooktop, Microwave Drawer Sensor, 1.0 cu. ft. 1000W, Automatic Opening Drawer, 3.6 cu. ft. Oven capacity, True European Convectio
While using started sparking. At times it has actually caught fire. Can the cover be removed and still use oven?
It can be, but it's not recommended. Food can splatter and get into the waveguide and cause problems. Also if you reach in there with your finger right after the microwave stops, you can get a severe shock (until the capacitor discharges, usually in about a minute). Also the edge is sharp.
Posted on Nov 27, 2014
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Posted on Jan 02, 2017
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It sounds like what you are talking about is an issue with the waveguide cover. It is usually made
of a material called Mica. Its purpose is to cover the aperture through which
the microwaves enter the oven cavity from where they are produced by the
Magnetron behind the control panel. It stops moisture and food particles
getting into the "workings" of the microwave.
if your microwave is working ok and behaving itself
then there is nothing to worry about, but there may be one of 3 problems that
may arise which should be rectified.
1. Its fallen off.
2. It has a hole in it.
3. It is arcing or sparking during use.
In any eventuality it should be replaced. If it has
fallen off or got a hole in it then there is the risk of food or moisture
getting into the waveguide which will reduce the efficiency of the oven. If it
is arcing or sparking then continued use will damage other components in the
microwave including the oven cavity which could be costly to rectify.
If there are any issues with
your waveguide cover it should be replaced. When new the mica sheet is rigid
and firm. Over a period of time it absorbs moisture and gets food splatters on
it. It then becomes soft and flexible. The cover can be replaced either with a
suitable replacement made by the manufacturer of the microwave or if the old
cover is in good enough shape to be used as a template, blank sheets of mica
can be purchased and cut to fit.
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