Question about Sharp R-1481B Microwave Oven

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Smell of burning wires and kicked the circuit breaker

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Hello the smell is properly from one of the transformers in the oven, if you remove the panel , check the transformers you will see burning marks around it,

Posted on Jul 22, 2010

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Posted on Jan 02, 2017

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I have a problem with my whirlpool microwave oven, all of a sudden it shut off the kitchen electricity and tripped the circuit breaker of the kitchen, I unplug the oven and reset the circuit breaker, but...


Hi heshamyg, I want to help you with your problem, but I need more information from you.
Since I could not find the electrical specs for your particular model in the user's guide, please locate the information tag (plate or decal) and tell me what the wattage and amperage ratings are.
Page 5 of your user's manual recommends that your microwave should be used on a 15 or 20 amp circuit And that a "separate circuit servicing only this appliance be provided."
I don't know if this appliance is a new install to your kitchen appliance array, or if this unit has been around and in use for awhile without any problems.
Either way, the electrical circuit is being overloaded; short circuited; or because of a ground fault.

An overloaded circuit is one primary reason for a breaker to trip. It occurs when a circuit has more connected electrical load than it is supposed to have. When more current runs through the circuit than the circuit was intended to take, the circuit breaker is designed to "break the circuit." It does so to prevent overheating of the wire in the circuit, which can cause a fire.

  • The most probable reason the breaker tripped is that you simply have too much plugged into one outlet or multiple outlets connected to one circuit.
  • Move lamps, heaters, irons, hair dryers and other heavy power consuming devices to a different circuit not being heavily used; or
  • Turn off some of the devices on the circuit to reduce the load.
  • Loose connections are another possible but less common cause. With power off, check outlets for a loose wire and the electrical service panel hot wire connected to the circuit breaker to see if it has become loose. Re-tighten the connections if necessary.
  • If these suggestions do not solve the problem you may have a more serious problem such as a Short Circuit or Ground Fault
The Short Circuit is a more serious reason for a breaker to trip. A short is caused when the hot wire (black) touches another hot wire or touches a neutral wire (white). It can also be caused if there is a break in a wire in the circuit. Shorts are a bit more difficult to diagnose because they can be caused by the wiring in your home or in something you have plugged into an outlet.

  • Confirm that the power is off at the outlet into which your device is plugged.
  • Inspect your power cords for damage or a melted appearance.
  • Check your outlets and plugs for the smell of burning- or look to see if there is any visible brown or black discoloration.
  • Check the insulation on the wires to make sure that they are not cracked; and that bare (uninsulated) black and white wires aren't touching together.
  • If you do not find the problem, repeat the process for all the outlets in the circuit.
  • Check for a Ground Fault condition.
A Ground Fault Condition is defined as: An unintentional, electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors, metallic enclosures, metallic raceways, metallic equipment or earth.
In simpler terms, a ground fault condition exists when the hot wire (black) touches the ground wire (bare copper) or the side of a metal outlet box (because the metal box is connected to the ground wire). The ground fault is a type of short circuit.

The fix is the same as a short circuit except check that the hot wire (black ) is not touching the side of the metal outlet box or the ground wire.

If the problem is internal to the microwave oven, have it serviced by a properly trained service technician since one could expose themselves to dangerous levels of microwave energy.

Please keep me posted. Thank-you.

Dec 02, 2013 | Whirlpool MH1140XMS Microwave Oven

1 Answer

Iberna oven ,when i switch on the oven it chips the fuse box out


First of all check the inside of the cooking area for chips in the paint and burn marks. If there are none then you may repair this unit. Open it up and check the many thermal overloads for open circuit. Then check for burned wires and repair any if found. Then replace the fuse if blown. Then change the magnetron and possibly the capacitor. Also verify that the door closes properly and that the circuit board has no burned components or burned circuit traces. Sometimes the relays stick and need replacing but that would not cause the breaker to trip.

Oct 16, 2013 | Sharp R-1481B Microwave Oven

1 Answer

Our GE dishwasher has been working fine for years. Now it is tripping the braker? all wiring is good right to the dishwasher. We did smell burnt wires but it went away.?????


Your dishwasher may be damaged beyond repair. When I installed the dishwasher in my home I found that there is a surprising number of wires bundled under the dishwasher. If you are skilled in that field you can pull the dishwasher out and try to repair the damaged wiring under the machine. However once you've smelled burned wiring it means that there are potentially significant problems in there. You aren't smelling the burnt wires anymore because the damage is so great it's just tripping the breaker. If you continue to try and force the machine to work in this situation you may end up with a fire and further damage.

Please be careful.

Apr 06, 2011 | Microwave Ovens

1 Answer

Microwave stopped working with no warning. They had a recall on this model and since they ordered two parts it has not worked right


Just had my Kitchen Aid Microwave KHMS155LSS burn up and bellow smoke.

Thankfully, I was close by, stopped the microwave, vented the smoke, turned off the circuit breaker and unplugged it. Still the smell of burned motor, burned plastic has me concerned. Did it get hot enough to cause problems behind the drywall? So far, I am keeping a "fire watch" to make sure nothing is smoldering.

Feb 12, 2011 | KitchenAid KHMS155LSS 1000 Watts Microwave...

1 Answer

Comes on and kicks breaker smells like something is burning


if you smell burning then i would say the transformer is burning and if will trip breaker . some times the mag has failed causing over load to trans and both will have to be replaced. this is a big buck repair . you may want to replace ..

Jan 04, 2010 | Hotpoint RVM1435 Microwave Oven

1 Answer

I have a Kenmore Elite microwave oven... 69-65e05590-000637. We noticed that it would not heat food or liquids... played with the power level a bit and it started to heat again...then a day or two later we...


Is this oven still under warranty? If so, take advantage. If not, remove the power plug and the case. Short out, with a screwdriver, the large can-shaped capacitor with two terminals sticking out. Check the wiring and circuit board for signs of burning. If everything looks ok, remove the thin sheet metal wave guide that sits above or beside the microwave energy port into the cooking cavity. Under the sheet metal, there is a metal fan-like device called a 'stirrer' that has a plastic bearing. Remove this stirrer and smell the bearing. If it smells like the burning wire smell, replace the stirrer. You can buy it through 'Sears Parts' online.

Sep 14, 2009 | Microwave Ovens

1 Answer

Was using it last night to heat something up. When almost done, microwave made a zizt type of sound and went off. I turned it back on and it continued cooking, but I started smelling burned plastic or


More common then you think, i have gone through a couple microwaves in the last ten years, they both failed very similar to what you describe. One popped the breaker one day, reset the breaker and it worked again but had an odd smell to it. I took it apart and couldn't find anything burnt or melted so i tossed it and got a new one, i didn't want a microwave burning the house down! I would suggest unless your really tied to that microwave that you just replace it for safety sake. Four years or forty years old don't matter anymore, i had one microwave, LG brand, that died two months after the warranty expired and it would cost more to repair it then replace the thing!

Jan 11, 2018 | Panasonic NN-H964 1200 Watts Microwave...

1 Answer

Kenmore over the range microwave 721.63684300 - nothing works


you must remove the MW take off the cover then look for a large metal can (capacitor) and a white (ceramic) fuse...look and, smell and, you should find the cause

Apr 02, 2009 | Kenmore 63682 / 63684 / 63689 Microwave...

4 Answers

Burning wire smell


Since it's less than one year old, it should be fully covered under warranty.

I'd suggest contacting the manufacturer to get it fixed free.

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

Nov 20, 2008 | LG Microwave

1 Answer

Service to Whirlppol MH7130xez-1, circuit breaker popped then unit went dead


water may have leaked inside unit causing a short.the transformer output is about 1400 volts that feeds a large capacitor. a direct short can blow the transformer instantly or any support parts without time to burn something. creating little or no smell. I never sujest that a person
to try to repair a microwave oven because
the capacitor can still be charged and very lethal.

Feb 25, 2008 | Whirlpool MH7135XE Microwave Oven

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