Model no MW9339SB S/n 203054795MM
Sounds like the magnetron isn't getting power or is faulty. This is the thing that emits the microwaves that cause food to be heated. Basically it's like the 'engine' of the microwave. Your engine either has no power for some reason or it has died.
If you had the skills required to fix this then you probably wouldn't have needed to ask the question here. Just like a car, you can't fix a broken engine by pressing buttons; it needs the intervention of a mechanic. It's the same with your magnetron.
The Emerson is a cheap brand and this is a cheap microwave. Spending $80+ on parts and labour to fix a $60 microwave makes no sense. Sorry, but thems the facts. Unless you can get a cheap replacement magnetron for under $30 and fit it yourself then I'd seriously consider buying a new microwave of a decent make with a better reputation for reliability.
Check and replace magnitron with one of the same number or equivalent.High tension transformer fuse may be blown or high voltage diode and or capacitor shorted. N.B. Please disconnect applance from mains and discharge large capacitor before carrying any DIY on any microwave,
SOURCE: Microwave turns on, but no heat or turntable movement
The problem is that the magnatron is not getting power. Chance is that if could be a bolwn fuse inside the unit. If the fuse don't fix it then that leaves the charging diode, capacitor or the magnatron, or high voltage xformer of which without technical epertize I would not recomend attempting to replace. good luck
SOURCE: sharps microwave
This is usually caused by either a bad door switch, a loose door switch mount, or occasionally a problem on the control panel.
Door
switch or mount trouble can be 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
you or someone you know decide to look into it, we have critical
information on safety, disassembly and door switches at our site, and
our link is at our listing here on FixYa:.
You can probably find exploded views and order parts by entering your model number (R-520JKF) here at the Sears parts site.
The best place to order Sharp parts is Tritronics.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
SOURCE: Microwave Oven Does Not Start Cooking
This
is usually caused by either a bad door switch or a loose door switch
mount, which are pretty simple problems to fix.
Even though a door
switch clicks, it may still be bad inside.
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.
One test that sometimes
helps is to
gently lift up (and/or push down) on the door or handle as you try to
start it. If it works or tries to work, then it's a door switch mount
or
door alignment issue.
If you or someone you
know decide to look
into it, we have critical information on safety, disassembly and door
switches at our site, and our link is at our listing here on
FixYa:.
You can find helpful
exploded view diagrams and order parts by entering your full model
number here.
There should 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.
If you don't find yours, or if you want to look at it without disassembling the oven, you can download it here.
If yours is not shown at the parts site or manual site linked above, Please reply back with your brand and model number so we can help you.
If you only need a
switch, you can order a universal type here for $5 postpaid.
If you think the problem
is on the control panel, we repair these nationwide by mail
for $39.95 postpaid in most cases in about a week or so.
We're
happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
SOURCE: microwave doesn't heat food anymore
Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.
The cost of the magnetron is about 95% of the cost of a microwave oven.
Most people don't, for this reason, replace the magnetron, they replace
the whole oven which is probably what you will end up doing.
There is a possibility that the circuit that provides power to the
magnetron is faulty and you need to take it apart, find the proper
electrical leads and test them with a volt meter. To do this you have
to remove it from its mounting and take it apart. It is a fairly
lengthy process however.
Benjamin
If you find the fuse blown or circuit breaker tripped, unplug everything from the circuit to which the microwave is connected (keep in mind that other outlets may be fed from the same circuit). Replace the fuse or reset the circuit breaker. If the same thing happens again, you have a problem with the outlet or other wiring on the same branch circuit. If plugging in the microwave causes the fuse to blow or circuit breaker to trip immediately, there is a short circuit in the power cord or elsewhere.
The microwave oven may be powered from a GFCI outlet or downstream of one and the GFCI may have tripped. (Removing a broken oven lamp has been known to happen.) The GFCI outlet may not be in an obvious location but first check the countertop outlets. The tripped GFCI could be in the garage or almost anywhere else! Pushing the RESET button may be all that's needed.
Next, try to set the clock. With some ovens the screen will be totally blank following a power outage - there may be nothing wrong with it. Furthermore, some ovens will not allow you perform any cooking related actions until the clock is set to a valid time.
Assuming these are not your problems, a fuse has probably blown although a dead controller is a possibility.
While you can do some repairs on your microwave, what you don't know can kill you... even on an unplugged microwave, so make sure you understand the dangers and how to reduce them before you try anything inside a microwave. If you want to do more yourself, go to the link at the top of this post.
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