Question about Sharp Microwave Ovens

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Our Sharp R-3A86 (corrected product ID#) microwave oven stops intermittently. The timer keeps counting down, the light stays on, but carousel stops, fan stops, and heating stops. Sometimes it works fine for a several minutes, then suddenly stops. A faint plucking sound happens when you it the "start" or "stop" buttons, but I don't know if that happens normally, as it's faint enough to be drowned out by the fan. Sometimes it will work for several minutes, other times for less than five seconds. I've tried leaving it unplugged for a while with not results. Any ideas? Thanks!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: No Heat

This is probably due to a bad door switch, most likely the top one. The microwave got hot because the cooling fan was not running. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your model number here: http://www3.sears.com/

Posted on Apr 26, 2007

SOURCE: Fans continues to run.

door switches or control circuit, may be loose contact or open check all wiring and circuit...

Posted on Dec 18, 2007

Coldcut
  • 1554 Answers

SOURCE: Emerson Microwave MW8115SS

there is a thermal fuse inside that is likely blown.
easy to replace just have to google bullet thermal fuse.

Posted on May 12, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: Sharp R-1450 microwave

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

On these, it's usually a broken tab on the upper switch holder.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

That sounds like what's happening when you hold the Start pad - maybe you're moving the frame and chassis enough to help it work.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

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 here at the Sears parts site.

The best place to order Sharp parts is Tritronics.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Aug 19, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: Sharp R-530ES microwave oven stopped working

You have a bad secondary interlock (lower door switch) or its mount is damaged or out of alignment.

We have the service manual for this model and have uploaded it to our site here to help you.

You will need the
free Acrobat Reader to view or print it in case you don't have it.

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

Door switch or mount trouble is usually 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 only need a switch, you can order a universal type here for $5 postpaid.

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


Posted on Dec 28, 2008

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Bottom door switch trouble or its mount is loose, misaligned, or broken.

See my help file: http://www.microwavecontrol.com/doorsw.htm

- William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

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there is a thermal fuse inside that is likely blown.
easy to replace just have to google bullet thermal fuse.

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