Question about Sharp Microwave Ovens

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My Sharp microwave Model R-4A54 runs on after being shut off. Will stop if door is opened but will start again if the door is shut. Tried unpluging and repluging but the problem remains.

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  • Sharp Master
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Defective door switch will do it .

Posted on Feb 19, 2019

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9156 Answers

SOURCE: Microwave works with the door open

The top door switch is almost certainly defective or loose. Most likely the latter, and possibly due to a loose or broken mount. Chances are that only the fan and light are on, but it's not wise to take chances with microwave energy, whuch can cause burns and fire. One way to possibly test this theory is to pull up gently on the door and see if it stops doing it. But that's not a foolproof test. A broken or loose mount can be caused by inadequate plastic or improper assembly techniques during manufacturing, by slamming the door, or other physical damage. Bad door switches are usually caused by opening the door while it's cooking instead of hitting the STOP KEY first. I have a helpful text file on door switches with safety tips that will help you. You can find it by searching on Yahoo.com (not Google) for microwave safety.txt Good luck and be safe!

Posted on Nov 11, 2006

red-pt
  • 2 Answers

SOURCE: Microwave automatically comes "on" when door is closed, but no heat.

I have the R-1460 in the same series with the identical symptoms. After reading MicrowaveSvc's solution I started taking apart to view the door switches and found the upper door switch to be the problem, but not a switch failure a support failure. A small bottom plastic support post that holds the switch in place was broken (probably from repeated use/abuse) allowing the switch to move when the door hooks were engaged, thus not actuating the button switch. Since the problem was mechanical rather than an electrical bad switch, I made a small support arm for the switch from an old plastic mechanical pencil and glued it in place to hold the switch in its correct position. Problem solved, microwave works! Thanks to MicrowaveSvc's description of door switches.

Posted on May 26, 2007

MicrowaveSvc
  • 9156 Answers

SOURCE: Microwave does not turn off

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk

You can get Sharp parts from Tritronics at http://www.wehaveparts.com

Posted on Nov 05, 2007

MicrowaveSvc
  • 9156 Answers

SOURCE: Emerson MW8119SB microwave wont stop running with door closed

It should have a one-year warranty on parts and labor.

I'd call Emerson at 1-800-695-0098 to find your nearest authorized service center to have it fixed free.

It's probably a bad door switch or door switch mount.

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Jun 22, 2008

  • 1 Answer

SOURCE: Sharp Carousel Model R-1440 won't shut off

Take it immediately to a local Microwave repair shop...looks like one of the circuits may have gone...otherwise switch off from mains

Posted on Oct 20, 2009

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1 Answer

Microwave wont shut off


there is just a malfuction in the circute board go and get it fixed

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Sharp Carousel Microwave I heated some food. It worked fine, and shut off when it was done. I took out the food. When I closed the door the light stayed on. Light will not shut off. I tried...


Sometimes the switch in the door latch sticks. Mine did that and I ust closed the door with just a slight more force and everything started working fine.

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I have a workaround for you, that works for other brands. I am not sure if it will work in your case though. Pls try it:
- It seems that the door closing sensor is not working well, so it might think that the door opened.
- Once you have this problem, open the door and then close it again.

Normally it should work...

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Why does the fan on my Sharp Carosel II microwave continue to run? Model R-8560


From the description one of the door switches is defective, if you have a digital meter then I will walk you through the testing phase.

Jul 06, 2012 | Sharp Microwave Ovens

1 Answer

My Sharp R-975 Microwave after settin the timer and starting only runs for 59 seconds and stops, I can press start again and it goes for another 59 seconds


This is a problem in one of the damper-related components, either the switch or motor or the damper door may be binding.

The damper is a door inside that opens or closes depending on cooking mode. If the controller senses that the door is not in the right position, it will shut down the cook cycle.

Sharp models stop after 59 seconds.

See the attached sample drawing for a typical damper assembly.

I'm not sure this is a US model or if parts are still available, so look up Sharp in your country.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

microwavesvc_30.jpg

Mar 13, 2011 | Sharp Microwave Ovens

1 Answer

Sharp Carousel Model R-1440 won't shut off


Take it immediately to a local Microwave repair shop...looks like one of the circuits may have gone...otherwise switch off from mains

Sep 28, 2009 | Sharp R-1480 Microwave Oven

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Sharp Microwave oven R-96STM Problem started after powercut. Whatever duration timer is set for, power always stops after 59secends. After pressing START button again, oven runs for a further...


This is a problem in one of the damper-related components, most likely the switch, but it may also be the motor or the damper door.

The damper is a door inside that opens or closes depending on cooking mode. If the controller senses that the door is not in the right position, it will shut down the cook cycle.

Sharp models stop after 59 seconds.

See the attached sample photo for a typical damper assembly.

Info on ordering Sharp UK parts / spares is here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

ecffbaf.jpg

Sep 07, 2008 | Sharp Microwave Ovens

2 Answers

My microwave has stopped working and switched on suddenly!!


Sounds just like a bad door switch or door switch mount. Probably the upper one. Safety info, disassembly tips, and door switch test and replacement info are all available at our Web site. See http://tinyurl.com/yzjozk

Jan 14, 2007 | GE JVM1660 Microwave Oven

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