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Microwave fuse keeps blowing

I have a Sharp Carousel 1000watt microwave. I couldn't find the model number. It lost power and I opened it up to check the fuse. I replaced the fese with a 250v / 20 Amp fuse. It powered on and I was able to set the clock. As soon as I tried to run it for a test, it blew the fuse. Any suggestions or "flow chart" advice would be helpful. Thank you.

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  • jmcardle6 Dec 27, 2008

    My micro. blew a fuse while cooking. I replaced the fuse and programmed the clock. when I try to cook, the fuse blows again , what is the next step in t/s this problem?

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1 Answer

Ckeck your door switches and h.v doides if you know how if do not get serviced by technician

Posted on Mar 21, 2008

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Posted on Jan 02, 2017

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Sharp carousel microwave convection oven keeps blowing fuse


The service manual is here:
http://www.microwavedisplay.com/r820bc_bk_bw_sm.pdf

You can get Sharp parts from Encompass here.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
See http://www.microtechfactoryservice.com/cap_test.html

If it went dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
See: http://www.microtechfactoryservice.com/xformer.html

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
See this: http://031d26d.namesecurehost.com/mwd/doorsw.txt

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Yesterday, my sharp carousel r-1460 went dead. I took apart the front keypad and replaced the 20amp fuse behind it. the microwave light and fan work.But, when I start microwave to cook something, pop! fuse...


If the 20A fuse is blowing, it is often the high voltage transformer or magnetron. If this is the case, and the microwave is not under warranty, replace it. Residential microwaves are generally considered disposable. Parts and labor are just too expensive. A magntron or transformer can cost more that half the cost of a new microwave.

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Does model, R 4A94 sharp carousel microwave oven have reset butto


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Wattage Sharp Microwave Ovens Carousel Model R-3A35


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Sharp microwave stopped working


Is it totally dead? No display? Or just does not cook? If it made an unusual noise before it 'died' something probably shorted out.... You need an ohm meter to troubleshoot. If the fuse is open, switches and HV circuit need to be checked before replacing fuse. Sometimes on the convection Microwaves (not just Sharp) the fuse will 'rust' and open rather than blow. Or the fuse holder can over heat and fail.

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Sharp Carousel Microwave has no power


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

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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.

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1 Answer

Buzzes when starting then blows the fuse


there is an electrical problem.
my suggestion is that you will have to dispose that microwave and get a new one.
you dont want to chance a fire. andwave c yes mircroan cause fires.

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