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It just stopped working... is it a fuse or something?

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  • Microwave Ovens Master
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Mason,
If everything has gone dark, then more than likely it is a fuse. If you open the door and the cavity light comes on, the fuse is okay and you have a different problem. Assuming that everything has gone dark and that you are talking about a counter top microwave, you can follow these directions to find where your fuse is located.
Unplug your microwave and turn it around and remove the screws holding cover on and then remove the cover. Be very careful about touching electrical connections because there can still be some live current stored in the capacitor. 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!

Posted on Apr 29, 2015

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Line Fuse


Every microwave oven has a line fuse. This fuse is designed to blow if too much current is drawn through the microwave circuitry. The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.
Main Control Board


If the microwave is not working the main control board may be defective. This is not common. When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


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If the microwave is not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
Thermoprotector


If the microwave is not working the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown2_6_2013_8_43_03_pm.gif2_6_2013_8_43_37_pm.jpg

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My microwave just stopped working. No problems until now. In the middle of cooking it just stopped. No display, no beeps, no bouttons working, no light inside. There is power to the outlet I can plug in...


for the microwave to stop suddenly it has blown its internal fuse this is located under the top panel of the unit it should be white with two silver tips ( ceramic fuse) in some cases the fuse will blow for no good reason on the other hand it can be a serious fault the fastest way to check this is to replace the fuse and re test the unit if the fuse blows instantly then bin the microwave if not it the fuse may have simply failed


best of luck always remember unplug the unit first and always replace with same size and and current fuse

please rank this advice if it helped you

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My model nn-p295wf microwave stopped working ,all power just stopped, about a year ago. I took it to a repair shop and they replaced the DIODE and the fuse, then it worked again. Afew weeks ago it happened...


Replace the magnetron, safety fuse and diode as a set and check the door interlock switches.
That should get it working for another year or so.
Don't forget microwave mains fuses are special sand filled and semisurge type.

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Yes there is a fuse, and this is fairly common, however I always recommend a service technician do this repair, unless you are very comfortable with electricity. The microwave oven is very dangerous to work on if it is plugged in, never do this. Unplugged there is a capacitor that can still give a good shock. This capacitor needs to be discharged before replacing the fuse. Good Luck, Appliance Specialists

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sounds like you blew the fuse inside

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check the fuse on the microwave. if its busted, something shorted out in the oven that tripps off your breaker. it could be your inverter.

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Generally, you get something unless the fuse inside is blown. There is generally a fuse inside the unit when you remove the button package. First, make sure that the outlet you have is good. Plug something else into it and see that it works.

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