Question about Magic Chef MCD1311ST Microwave Oven
What fuse??? the power outlet fuse of the electric circuit?? the microwave fuse inside??? remember microwave oven need a lot of power you should not plug anything els on the same circuit...
if it is the fuse in the microwave, than it could be a sign that the magnetron is about to fail, or it could be a bad/erratic door safety switch that shorts from the oven's vibration... if it's the magnetron it is cheaper to buy a new microwave, if its the safety switch it can be replaced... not to expensive...
Posted on Mar 16, 2011
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Posted on Jan 02, 2017
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causes are an open thermal protector or thermal fuse but could also be blown
fuse in HV area of microwave (somewhat uncommon in domestic microwaves).
Less likely causes are failure of other parts in the HV area.
If the main power fuse is located in the primary of the high voltage
transformer rather then at the line input, the clock and touchpad will work but
the fuse will blow upon initiating a cook cycle. Or, if the fuse has already
blown there will simply be no heating action once the cook cycle is started.
There are other variations depending on whether the cooling fan, oven light,
and so forth are located down stream of the fuse.
Some models may have a separate high voltage fuse. If this is blown,
there will be no heating but no other symptoms. However, high voltage fuses are
somewhat rare on domestic ovens.
A number of failures can result in the fuse NOT blowing but still no
A shorted HV diode, magnetron, or certain parts of the HV wiring would
probably result in a loud hum from the HV transformer but will likely not blow
the main fuse. (However, the HV fuse - not present on most domestic ovens -
Depending on design, a number of other component failures could result in no heat as well including a defective relay or triac, interlock switch(s), and controller.
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