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My kitchen wall circuit had a short and the micro was in use and shut down. I can't get it to power back up in any fashion. I have changed the fuse & still no change. Any suggestions ? Dave

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Many times outlets are linked one to another via a gfci outlet. Try resetting all the gfci outlets in the kitchen

Posted on May 02, 2015

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Sharp R-9H84B-display black, cleared display shows "Conv Mix, 88:88 Auto". Short time all dark again. Hit clear happen 2 times then, all dark, no power, can't clear won't start, nothing works.


R-9H84B - May 29, 2017

I would suggest pulling the control board out and looking on the foil side (opposite the component side) for "ring cracks," most likely on the low voltage transformer's connections.

The board may have the screen-printed reference designator "T1" near the low voltage transformer.


ring_cracks-gr02aocewnccyez3v1hdhepo-1-0.jpg

Also be sure the fuse is not easy to turn with your fingertips when it is in the holder. If it is, the fuse holder is too loose and must be replaced (not just squeezed with pliers).

You can order a fuse holder, part number WB06X10034 for $6.49 (subject to change) from the Pros here.

If you have any keypad issues, please note that the membrane keypads for this model have long been discontinued.

FixYa does not directly notify us experts of responses, so if you have other questions, please contact me directly.

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1 Answer

Kitchen Aid microwave KHMS105EWH-0: I started to heat a cup of coffee, it momentarily interrupted power to the kitchen, fluorescent lamps went out, then slowly came back on. More below.


Because of the loud snap you are hearing, my guess is you have something shorting out in the high voltage section of the microwave. I'm surprised it is not blowing the internal microwave fuse yet. Average repair cost depending of what part it going bad is approximately $150 to $200. Considering the age of your micro my suggestion is put the money towards a new one.

Mar 01, 2015 | In Microwave Ovens

1 Answer

How to change fuse


If it is an over the range unit then the front control panel will come off and you can gain access to the fuse. A wall unit panel will open up and again gain access. If it is a counter top unit. the case will have to removed and you will gain access to the fuses. Now what tripped the fuse. It could be a bad door switch. a shorted high voltage capacitor or it may not be a fuse at all it could be the flame sensor tripped or the magnetron sensor. Some over the range units have a sensor that will shut it down if the stove gets too hot. look for burned connectors. be very careful of the high voltage circuit and make sure the power is off.

Oct 12, 2014 | Microwave Ovens

1 Answer

Why r 872 blowing 8w ceramic fuse repeatedly


Most microwaves usually use 15 amp fuses and not 8's. If it keeps blowing fuses there is a short circuit somewhere and you would need to track that down to stop your problem. A frequent possibility might be one of the micro switches in the door circuit.

Aug 13, 2014 | Sharp Microwave Ovens

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Where are the fuses in my microwave oven,?


Inside behind the display panel on a small circuit board.

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Unplug, remove top, look under keypad, follow wires to circuit board, look for a silver rectangular capacitor, "may be under a plastic flap" discharge capacitor with a screwdriver across the 2 points, look for a small fuse near by in clips, remove and replace with same current rating, assemble before test because lethal voltages present when powered.

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GE JES1651 microwave stopped woring


it might have short circuited. also check the cable for any break in the line.also take the back of the micro wave and check for any broken wires of pulled out wires.

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GE Spacemaker Microwave JVM1441 BH04 tripping circuit breaker


your power transformer for the magnetron could have a shorted primary power winding,the door safety interlock switch could be mis-adjusted,this normally blows the internal unit fuse,a shorted high voltage capacitor,or diode,a bare wire inside the unit,more than the microwave on that circuit or a weak circuit breaker in the house power panel

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1 Answer

Sunbeam SMW5500 micro/convection oven shorted out when opening door


You are decribing a typical Door Safety Switch problem. The Door Safety Switches has Failed.The Door Safety Switch is designed to shut down the Micro in the event the Micro is still cooking when the door is being opened. The first "Click" of the switch cuts off the "Cook". If it does not cut off the "Cook", the second "Click" blows the power. Otherwise it would "Cook" with the door open, and I need not to tell you how DANGEROUS that could be. It first Tripped the Circuit Breaker which supplies power to the Microwave. After Re-Setting the Breaker the same thing happened except this time the Micro is DEAD- not even a light working. Yes, there is a line FUSE inside the Micro. You however need to address the Door Switch SHORT before replacing the fuse. If not, it will just Blow The Fuse Again, and Again, until the Short is corrected.
Call around, ask How much to replace a Door Safety Switch.
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1 Answer

No Power Whirlpool MH7140XF


does it not light up at all? A microwave has a fuse on it. Probably accessible from the back panel. if not you would need to disassemble it. Most likely cause of this is slamming the door broke one of the safety switches the door has so the microwave knows when the door is open. And it shorted against something when it broke. It might have simply blew the fuse but then again you might have fried it.

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