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Matt Cowell Posted on May 02, 2012

Sharp 1200w microwave seems to be tripping lightly (can hear clicking noises)and cause heating to be irregular

It seems to work sometimes , but will keep making a clicking sound and you can see the lights in the house ever so slightly dim when the clicking happens. Sometimes it doesn't heat at all, then the next time it will, but only when making these tripping noises. I thought it might have been cockroaches, as they love the control panel, but i'm not sure. Any ideas?

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John A Demers

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  • Contributor 12 Answers
  • Posted on May 02, 2012
John A Demers
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Clean the food off the inside top of the microwave Now,Or that noise you are hear will stop along with the microwave. The food gets on the Formica Squire which is how the micro waves heat your food. 1st unplug the Microwave then spray the inside of the unit with something like Fantastic or something strong and use glove so you don't burn you hand,Also if you have a scrub brush use it,And clean all the soap out and raise very well.

5 Related Answers

VEKAT

Devabhakthuni Venkateswara Rao

  • 225 Answers
  • Posted on Oct 20, 2007

SOURCE: SPORADIC HEATING

check highvoltage crcuit ,and check fan, and turntable motor,

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MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on Dec 02, 2008

SOURCE: Microwave won't heat.

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.

Door switch or mount trouble is usually 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:.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

There may also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

If you only need a switch, you can order a universal type here for $5 postpaid.

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.

MicrowaveSvc

William Miller

  • 9179 Answers
  • Posted on May 31, 2010

SOURCE: Whirlpool microwave not working. inside light's

It depends on the model number, but it may be as simple as a door switch or the magnetron's thermostat / thermal cutout.

See our file on door switches here.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

If you don't find your mini-manual, or if you want to look at it before removing the controller, you can download it here (just enter your model number).

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

If you only need a switch, you can order a universal type here for $5 postpaid.

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

Anonymous

  • 2702 Answers
  • Posted on Nov 28, 2010

SOURCE: Swan SM2050 microwave - everything works (light,

you not going to like me now!!!! in two words,,,,,dump it,,,, your microwave is well past its best,,to fix it will cost more than its worth, and to be honest there getting cheaper by the day now?

Anonymous

  • 43501 Answers
  • Posted on Aug 13, 2011

SOURCE: My microwave intermittently (1) hums but

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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User manual for 1200 w carousel ser# 57088

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Products 1 - 50 of 359 - Sharp Microwave Oven 11452 User Guide. Pages: 0 Saves: 0 ... Sharp Operation Manual Microwave Oven R-308H, R-305H. Pages: 0 ...

Free Sharp Convection Oven User Manuals - Kitchen .


2helpful
1answer

Sanyo EM-SL40S microwave everything seems to be working fine but food doesn't get hot?

see this causes and fix it. GOD BLESS YOU
Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.


High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.


Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.


Thermoprotector If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.
High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food.
10_2_2012_12_38_27_pm.jpg10_2_2012_12_38_56_pm.gif
0helpful
1answer

Don't heat consistantly micro or conv--sympthems-- no oven light no heat --occasionally ok--- ser. #113806

Hello there,

The problem could be from the power diode. A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.
Also a capacitor could be faulty. A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating or working intermittently. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.
Finally, the magnetron could be faulty. A defective magnetron is the third possible cause of why your microwave is not heating. Test your microwave's magnetron. Replace it if it is defective.
You will have to test them and replace the faulty component amongst the three factors.
Hope this helped.
All the best.
Elect_Comp
1helpful
1answer

I have a sharp 1900 w/r 24 at microwave, display shows a single green dot, when switched on at the wall I just hear a normal sound as if the unit is operating but nothing works

In this case as the display does not show a clock then it seems the program controller is not working correctly. So check power - step down supply, if the pads are responding- if not faulty pads. Also the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean,solder and reset the board.

Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

Now unless the display works and the processor starts to switch on the MAGNETRON , the table and light will also switch on as it must heat.

So it is necessary to check the main controller unit as it seems to be the suspect..

10helpful
1answer

Microwave won't heat, light ,clock works the microwave just won't heat the items in it.

hELLO THERE
when a microwave quits heating but every thing else is ok normally
investigate these 4 areas

Investigate these three areas if your microwave won't heat but you hear a loud buzzing or humming noise:
microwave_diode.jpg Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

picturena.gif High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

microwave_magnetron.jpg Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

0helpful
1answer

Not Heating. Fan, turntable, light working.

I would definitely suspect the door locking mechanism in this case. If it was the sensor it would start and then stop within a short time.

The starter switch should click if you have the door open and time it for 01.seconds and press start. So that is the secon component to think of.
0helpful
1answer

SPORADIC HEATING

check highvoltage crcuit ,and check fan, and turntable motor,
0helpful
1answer

It just doesn't work.

Did he plug it back into the first spot? Assuming so and assuming it still doesn't work, then I would say that you have a blown fuse. That can be caused by a loose fuse holder, misalignment or damage to the door, etc. It may also have an open or tripped thermostat. We have text files covering critical safety, disassembly, and door switches. You can find them via a search on Yahoo.com (not Google) for this: microwave circuit repair At this point the oven needs to be checked out a bit. With these text files, and proper caution, it can be done pretty easily.
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