Question about Sharp R-1460 Microwave Oven

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

I have a Sharp Carousel R-1461 and yesterday it stopped heating. Every time the door closes, the light remains on and it sounds like it is running, but there is no heat. I have unplugged it and tried again, but it still does not work. The buttons work to some extent, I can set the time and power level, but I cannot get it to stop running without opening the door. I am also unable to enter a cycle time or start a cycle. The turntable is not moving. What could this possibly be, and, is it worth fixing? Thank you very much for any information you can offer me.

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Re: Microwave automatically comes "on" when door is...

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

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Re: Microwave automatically comes "on" when door is...

Same symptoms. Upper door switch; bottom plastic support broken off. A small zip-tie to hold the switch in it's proper place solved the problem.

Posted on Mar 29, 2008

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Re: Microwave automatically comes "on" when door is...

You probably have a failing door switch or the mount which holds your door switch is loose or broken. In most designs, it is the upper door switch that will produce these very symptoms when it is intermittent or its mount is broken or loose. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure. Slamming the door, damage during shipping or transportation and sloppy manufacturing techniques or materials are the primary causes of trouble with the door switch mounts. I have a text file called "doorsw.txt" which helps in diagnosing and repairing door switch problems, and a file called "safety.txt" which is of vital importance. If you or a friend decide to work on it, we have *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa:

Posted on Mar 16, 2007

Re: Microwave automatically comes "on" when door is...

Me too

Posted on Oct 27, 2008

3 Suggested Answers

SOURCE: No heating, no clock, no timer, otherwise fine!

One of your door interlock switches is defective . I would suggest having it repaired by a qualified repair tech in your area.

Posted on Oct 04, 2007

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SOURCE: oven makes operating noise when doo is closed without starting

This is usually caused by either a bad door switch, a loose door switch mount (which are pretty simple problems to fix) or occasionally a problem on the control panel.

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

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.

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.

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:.

The best place to order Sharp parts is Tritronics. You can call them at 866-779-5835.

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.

Posted on Nov 21, 2008

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SOURCE: I have a 1995 Sharp Carousel R-1440. Our power

Yes your oven's controller is probably malfunctioning you need to replace the SYSTEM BOARD but I personally suggest to buy an other oven.... the system board will be hard to find and expensive...

See if other electronics is acting funny since the power loss... you could CLAIM the damage from the insurance company

Good luck!!

Posted on Feb 28, 2011

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