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Microwave ovens store a dangerous electric charge - a capacitor is typically used. If a microwave hasn't been left off for many hours, without it discharging, the charge can burn or kill you, so it is not a recommended do it yourself repair. The fuses can be purchased and replaced easily, and I have done it on several occasions, but the danger should not be underestimated - trained technicians even can be hurt if they make a mistake. I regret having tried to do it myself without knowing how to be safe.
Unplug. Remove the top/side panel. The fuse will be obvious near the power cord it is a special non glass fuse used in microwaves. (i save many fuses from microwaves others placed at the curb so mine are always free)
If you know that a fuse is open, you need to find out why it went out before replacing it. There are typically three fuses in any given microwave oven. Line or monitor fuse, cavity temp fuse and magnetron temp fuse.
There is a line fuse for this oven. Remove the cabinet and the fuse should be close to the line cord. Replacement fuses should be found at your local appliance supply house.
The fuse is located under the keypad in towards the high voltage capacitor "silver rectangular in shape" before you take it apart "unplug and discharge capacitor" there are dangerous high voltages present, the fuse is a ceramic type and must be replaced with the identical size and rating. Now if the fuse blows again it is more than likely one of the door switches is defective.
There is an inline fuse that is accessed by removing the outer casing. Follow the power line in to the magnatron and you should see the fuse. Make sure the fuse that you replace it with is the same as the one you removed. If this doesnt work then the magnatron has gone out.
the protection circuit has operated, this is not uncommon on microwaves. the fuse is inside the unit and therefore require dismantling. replace fuse and all should be fine, if it blows again then you have a more serious problems
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