SOURCE: Replacing the fuse of a MCO160UW
A microwave can be dead for many reasons.
It may be the fuse, which is usually located on the floor of the oven behind the control panel or between the door switches.
If
the fuse is good, it may be an open thermostat or thermal cutout (TCO)
/ thermal fuse on or near the magnetron or on top of the cavity / body
of the oven.
If it goes dead for a while during or after cooking
then comes back on, the magnetron is probably overheating and causing
the magnetron thermostat to open.
Then when it cools, it closes the circuit and allows power through again.
When
checking thermostats, if it has a hood fan thermostat, that should read
open, as opposed to the others, which should read closed.
If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If
it goes dead or blows the breaker (or GFI) when you plug it in or open or close
the door, then there's a problem with a door switch or door switch
mount.
If it's intermittent or random, it may be a bad
connection, usually on the control board or a loose fuse holder, or
even an intermittent fuse.
You should do a continuity test on
the fuse while it's in the holder (with the microwave unplugged, of
course) then turn the fuse by hand or take it out and put it back in,
then test it again.
If you remove the fuse, then press the meter
leads against the ends, it can allow internal contact to be made and
make a bad fuse appear to be good.
If you or someone you know
decide to look into it, we have critical safety information and
disassembly information at our site, and our link is at our listing here on FixYa.
There may also be a "mini-manual" hidden inside the unit behind the
control panel or hidden on the left side behind the grille, which is
very helpful when troubleshooting & testing.
We're happy to help you and we'd appreciate your
thoughtful rating of our answer.
SOURCE: The light is off on my Magic Chef MCD11E3W
Since the owner's manual doesn't cover it, you'll have to remove the outer wrapper.
See these files:
http://wwww.microwavedisplay.com/safety.txt
http://wwww.microwavedisplay.com/disassembly.txt
Most
bulbs can be matched up at hardware stores, home improvement centers,
and places like Wal-Mart or even large grocery stores.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
SOURCE: my magic chef micro does not work. I replaced the
In many brands, there is a "mini-manual"
hidden inside the unit behind the control panel or hidden on the left side
behind the grille, which is very helpful when troubleshooting, &
testing.
At
our Web site, we have a video available
showing how to remove a typical over the range control panel assembly in under 5
minutes.
Some questions to help you or someone you know troubleshoot it:
When you hit "Start" to microwave, do
the inside light, cooling fan, and turntable
all come on?
If not, then you probably have a bad door switch or door switch mount and should
see these files:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt
If the inside light, cooling fan, and
turntable are all coming on, then the problem
is in the high voltage section, and then the next questions arise:
Any unusual noises? Is it louder or quieter
than usual?
We have a sound clip of what a
microwave should sound like when the cooling fan and high voltage section are
operating here.
A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode,
but a sound like gurgling into an empty
coffee mug is one symptom of a failed magnetron, and yet the mag can be bad
without that sound.
If there's no unusual noise, it may just be a bad connection at the magnetron.
Here are some links you or someone you know can use (in order given) for high
voltage section test help, but read the safety warnings first:
http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)
http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)
http://www.gallawa.com/microtech/xformer.html
Accessing some parts may require you to
pull the oven from the wall and remove the cover.
If so, the installation instructions are very handy, and it's best to have
two
people since the microwave can be heavy and awkward.
For more help from Magic
Chef / Ewave see here or their contact page or order
parts here.
You can download owner's
manuals for many Magic Chef models here.
We're happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
SOURCE: blowing fuse when opening microwave door
the microwave has a short in the power supply it can be the diode or the high voltage capacitor.have a tech check your microwave for repairs.good luck.
SOURCE: magic chef mcd1611st microwave oven,why is power
Hi, Check the fuse inside the microwave cabinet...
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....
Microwave Oven Basic Troubleshooting Tips
heatman101
Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Look for where the power cord goes into the back of the unit and follow the black wire from the cord to where it ends. It should stop an either a circuit board or a fuse holder. Make sure that you replace the fuse with the same amperage fuse as what you take out. You will find the amp rating stamped on one of the silver collars on each end of the fuse. Good luck!
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We replaced the big fuse that we could find and the clock and everything worked until we tried to heat something up and then it quit working again. Decided to call the repairman!! Thanks for the information though.
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