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I'd suspect the interlock monitor switch is stuck, or its mounting bracket is out of adjustment. This is designed to blow the fuse if you try to run the oven while the door is open. The switch is supposed to open when you close the door. This switch is replaceable, but you should have this oven repaired by a professional. There are lethal voltages present with the cover off, and the possibility of microwave leakage is the repairs aren't done correctly.
You probably just have a bad primary interlock (upper door switch) or its mount is loose or broken.
Door switch
or mount trouble is usually caused by slamming the door or by opening
the
door while it's cooking without hitting the Stop pad first.
There are
plastic mounts inside the microwave which hold the door switches and
onto which the door latches lock when you close the door.
The screws on these
mounts may be loose. If they get too loose, the switches will not be
activated properly.
Sometimes it's
a broken tab on the switch holder, allowing the switch to rotate just
out of position. This tab
can be hard to see, since it is under the
bottom edge of the switch.
If the switch mount is broken, it's usually more economical and
safer to add a dab or two of hot glue to the mount to secure the
switch. Let it cool for about 30 minutes before using.
We have
the service / repair manual for this model and have uploaded it to our
site here to help you.
It will give you safety info, step by step help in disassembly, troubleshooting tips, and part numbers.
Most computers will open this document automatically, but you may need the free Adobe Reader.
You can find
helpful exploded view diagrams and order parts by entering your full
model number from the tag on the oven here.
If a switch is all you
need, we offer a universal type for only $5 postpaid which you can
order here.
But if you need any cosmetic parts, enter your full
model number at the Sears
parts site. We're
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
MICROWAVES ARE MADE TO BLOW THE FUSE IF THERE IS A POSSIBLY OF DANGER--THAT'S A GOOD THING...SAFTY SWITCHES ARE MADE TO CLOSE(SOME UN-CLOSE) WHEN THE DOOR IS OPEN AND SHUT AND IT SOUNDS LIKE YOU DO HAVE A LITTLE DOOR PROBLEM---THE REPAIR SHOULD BE FIXABLE AND MAYBE REASONABLE,,MY GUESS COST-WISE ,,,75.00,,OF COURSE ,IT ALL DEPENDS ON THE SERVICE COMPANY--TRY AN INDEPENDANT SERVICER (NOT SEARS,ETC) GOOD LUCK TUNICA
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