Question about Sharp R-220HW Microwave Oven

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Sharp r-220hw not heating. everything else appears to be working. there is an electrical burn smell. can this just be a fuse problem or is the unit toast.

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Hi,


Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic
Microwave Oven Troubleshooting Tips

heatman101


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Posted on Feb 22, 2011

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That is a sign the magnetron has shorted and is the most expensive part to replace.

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MIcrowave emits an electrical smell while cooking. It still cooks, but has started emitting an odor recently when in use.


Is the smell ionized (the outside smell of a cold winter morning air) or more of an electronic component burning??? if it's more of an ionized smell it could be normal, (if the smell is strong) it could be a leaking high voltage cable (electric arching) bad insulator, if it's more of an electronic component burning smell, it could be a overheating component, in both cases you should have it checked by a professional technician...

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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

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All appears to work...fan/light/ display....but no heating occurs. I assume not a fuse problem since all but heat working. Would a bad door switch...there are three....cause this?


You have burned micro switches in the door safety interlock system. I have answered this question dozens of times here - i am surprised this answer didnt come up when you searched your problem.

There are two reasons for the heat to not come on when everything else works ... three actually, the third is expensive.

1) the capacitor has failed - dont try to service this unless and until you understand the dangers associated with this repair.

2) burned safety door switches

3) failed magnatron (they rarely fail)

remove the cover - find the door switch. Test them. With the door closed, the switches should read closed. If they read open (because they are burned because you open the door when the oven is operating) the oven doesn't know the door is closed so it will not turn the mangatron on - no magnatron - no heat.

I hope this informaation helps you ...

If you require additinal help, post to this comment.

If you are pleased, please leave positive comments

thanks for using fixya.com

a

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Magnatron or the HV Transformer. Each has a distinct odor, Mag is heavy and thick burning smell transformer is more electrical. Eric

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MY SAMSUNG MW6574W OVEN FUSE BLOWS AFTER 4-5 MINS OF REHEATING-NO SMELL OF BURNING -EVERYTHING ELSE WORKS FINE- NO LOOSE WIRING-ALL BULBS WORK FINE TOO- THE FOOD HEATS UP FINE EXCEPT THAT THE FUSE BLO


the insulation of the wiring has detiorated and with temperatue rising it further deteriorates. thus increasing the current consumption and blowing the fuse

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My sharp microwave is under 6 months old. I was


It may be a shorted high voltage diode.

Since it's less than one year old, it would be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

You can contact Sharp at 1-800-BE-SHARP (1-800-237-4277) or visit them online.

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

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After snubbing the darned thing overnight, plug it back it to see if it has recovered. These things do have primitive computers and we all know how reliable those things are- It may just have 'crashed,' just like seemingly all others. 

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The fuse will not be on the circuit board.Try looking around where the door switches are, or back around the fan area.If you still can't find it, trace from the powercord coming in and follow were both wires go.

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