Question about Sharp Microwave Ovens

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The door on my Sharp Carousel II Microwave Oven will not open. The display says LOCK. Looking at my booklet revealed that there is a safety lock feature. I tried to cancel by touching Autostart/clock, the number l and stop/ clear but it still will not open. What should I do now?

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  • Sharp Master
  • 8,820 Answers

Sounds like a drawer type microwave or a combo oven and microwave?

If your manual's instructions didn't fix it, you can try a hard reset.

Unplug it from the power line for a minute, plug it back in, set the clock, then try again.

If you still need help, please reply back with your model number so we can help you.

We're happy to help you. Once we have all your information and offer a final solution, we'd appreciate your thoughtful rating of our answer.

Posted on Jul 19, 2008

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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.

Nov 27, 2013 | Sharp R530EWT Countertop Microwave Oven...

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Sharp carousel convection/grill/microwave maybe R990


Hello :

This happens because of a bad door switch . The plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door .

Check also the turntable . It could be out of it's right place .

WARNING :

1:Don't slam your microwave door because this may cause the fuse to blow and this is the reason of bad door switch problem .
2: A microwave is capable of giving you a serious electrical shock even when it's unplugged , so I recommend you to call a repair technician for help .

please don't forget to rate .

good luck .

Jun 03, 2010 | Panasonic NN-S254BF Microwave Oven

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For a 1995 Sharp Carousel Convection Microwave oven Model # R-9H66 it has on display screen ''LOCK'' and will not allow any function, is there a solution? The light inside works when the door is opened...


Check the user book for the unlock code. This could be the child lock mode.

If one of the safety switches are defective, or if there is a sensed power supply fault, the uPC will put the oven in the lock mode for safety reasons.


Jerry G.

May 12, 2010 | Sharp R-9H66 Microwave Oven

3 Answers

Built-in Sharp Carousel II Microwave Convection Oven died.


There are a couple of safety thermostats in the oven to shut down power if something overheats. One is on the magnetron tube (the microwave source), the other is on the cooking cavity. These sometimes go bad. There's also a power line fuse that may have failed, or become loose in its mounting clips. These can be tested with an ohmmeter; they should all measure very close to zero ohms if they're good.

Another possibility is that the control circuit board in the oven may have failed. I have worked on several Sharp ovens where the power transformer for the board has gone bad for no good reason. If the board goes bad the oven may appear to be dead as well.

Microwave servicing is best left to professionals. If you're thinking of keeping this one, take it to a service shop (or call for home service) and get an estimate. Then decide whether to repair or replace.

Hope this has helped a little. Thanks for using Fixya!

Feb 02, 2010 | Sharp R-1874 Convection/Microwave Oven

1 Answer

Locked microwave


Try pulling up on door while pushing open button.

Jun 29, 2009 | Microwave Ovens

1 Answer

Sharp Carousel Microwave has no power


I too believe that a "protection fuse" was possibly blown. It would need to be found and get replaced. Hopefully it is just a fuse and nothing else because the way it sounds to me, the microwave may be damaged.

Good Luck!

Jun 11, 2009 | Sharp R-1870 Convection/Microwave Oven

2 Answers

My sharp carousel II microwave doesn't seem to have power. I checked the power source and that seems fine. Is there an internal fuse?


Is it dead, meaning no display, no light when you open the door and no beeps when you press a pad on the keypad?

We have the relevant service / repair manuals for this model and have uploaded it to our site here and here to help you.

They will give you safety info, step by step help in disassembly, troubleshooting tips, and part numbers.

Most computers will open these documents automatically, but you may need the free Adobe Reader

I would suspect the 20A ceramic line fuse or the magnetron temperature fuse.

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

20A ceramic fuses are available at local appliance part stores or places like Wal-Mart and Lowe's.

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

Jun 03, 2009 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Sharp Carousel Model R9H84B


I've attached the portion of the manual which shows how to lock & unlock this model.

If that doesn't work, unplug the oven for one minute, plug it back in aga9in, then try again.

If it still doesn;t work, then your keypad has failed, and they are no longer available for these model, so the oven would have to be retired.

Good luck.

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

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Jul 03, 2008 | Sharp R-230 Microwave Oven

1 Answer

Microwave locked


On the R1490-series, you press Custom Help > "1" > Stop/Clear to turn the child lock off.

This may work for you, or press Custom Help and look for a lock option.

If your model does not have a Custom Help button, please reply back with your exact model.

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

Jan 16, 2008 | Sharp R-1480 Microwave Oven

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