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Sharp microwave model R-520 does not operate unless light pressure is maintained on the door switch

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Then I would suggest replacing the door switch

Posted on Apr 01, 2015

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Posted on Jan 02, 2017

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How do I replace the inside light on my R-520 ks Sharp Microwave


I don't know the exact model but most MWs have a plastic panel that pops off easily. Some, however you must take the cover off the MW oven. Just a tad more difficult.

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My r-1874 microwave unit will not run unless a small wood handle is put under the door. This has worked in the past but now this little trick does not work. Any idea the part that not working properly


I would say the mount for your bottom or top door switch is loose, misaligned, or broken. And you may have a failed door as well. See my help file on door switches here.

Slamming the door and opening the door while it's cooking instead of hitting the "Stop" pad before opening it both contribute to door switch trouble.

The service manuals covering this model are here and here.

You can order Sharp parts from Encompass here or you can call them toll-free at 866-779-5835.

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Sharp Carousel R530BK microwave won't cook unless light pressure is kept on the door button.


There are door switches and one of them is evidently out of adjustment or the little actuator arm on it is.

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Sharp combo microwave: Turntable wont stop unless I leave the door ajar. Light stays on too while turntable is going. Everything else works fine - it just doesn't know when to shut up! :)


It's a door switch that's bad. Probably the secondary interlock switch. You need an ohm meter to verify switch not 'making' electrically. Usually the only thing that causes this switch to fail is from opening the door when the microwave is cooking, secondly, by cooking at very extended lengths of time.

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Sharp Convection Microwave won't heat and turntable won't turn.


I typically find it is not door hinge issues but door switch issues, especially with sharp. You may heve a little movenent in the door hinge and that is allowing the door hook to move up and down on the plunger for a door switch that is probably a bit melted due to bad connections. If you check the door switches and look for any browning around the terminals where the wires push onto the switch you will probably find an overheated connectoion. Replace the bad switch and run better wires and better termninals to the new switch and it will probably be fine.

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No! The problem is one or two bad door switches, or possibily the keypad control board.

Apr 11, 2012 | Sharp Microwave Ovens

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Sharp Carousel will not turn on unless I lift gently on the door.


the door interlock switch needs adjusting or replacement

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1 Answer

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.

Aug 21, 2008 | Microwave Ovens

1 Answer

Sharp R 520


Take the case off, loosen the screws, and slide the switch holder a bit.

Jul 27, 2008 | Sharp R-510HW Microwave Oven

1 Answer

Sharps microwave


The door switches go bad...little micro-switches. Check them for switching on and off. Some are closed when the door is open, some are open when the door is open. It could even be that the catch has moved out of adjustment. If that isn't the problem, you have to consider the brain board which is usually so expensive that the microwave is not worth fixing.

May 12, 2008 | Sharp R-510HW Microwave Oven

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