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Noisy Microwave I have had my LG microwave for about 3 months, and its now very noisy whenever its heating something. Nothing is on top or sides which would cause vibration, however when you press in the middle of the outer metal casing of the microwave it stops. should you take your hand off it starts again. Would it be worth getting it fixed? Any ideas if it would be under warranty?

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  • Microwave Ovens Master
  • 9,098 Answers

On the right side?

Usually there is a rubber pad on the high voltage transformer which prevents vibration due to the magnetic field of the transformer.

If that falls off, it can make the side vibrate.

Either way, 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.

For more Goldstar / LG / L.G. help, call 1-800-243-0000 (M-F, 7am-8pm CT, Sat 8-5 CT) and choose the appropriate prompt from the menu or visit here. You can get warranty info & find a local authorized servicer.

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

Posted on May 20, 2009

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1 Answer

Massive sparking and noisy when switched on to heat


Hi,
There are 2 things that cause the massive sparking:
1. you placed inside the microwave oven a metal plate or one with silvery or golden drawings;
2. the mica sheet that covers the magnetron window is compromised (has holes, it is cracked) or it is covered with burnt (carbonised) food.
You have to carefully inspect the mica sheet and wash or replace it, if necessary. Hope that helps.
Regards,
Dan

Oct 10, 2016 | Microwave Ovens

1 Answer

Microwave makes sound like something moving inside


follow this steps and use the VOM , and fix it. God bless you

  1. MagnetronIf your microwave is emanating high pitched or growling noises during operation, the magnetron could be going bad. Normally a nearly silent part, the magnetron uses high voltage and induces the frequency required to cook food. Although normally not a safety hazard to operate, this is a sign that the magnetron is failing and will need to be replaced as soon as possible.
  2. Exhaust fan motorIf your microwave is making a very loud humming noise during operation, it could possibly be the exhaust fan motor. If defective the part will need to be replaced to silence the appliance once more.
  3. Stirrer motorAnother leading cause of a noisy microwave is an expired stirrer motor. With use this part becomes worn and makes a loud grinding noise, which is usually a leading indicator that the part needs to be replaced. The stirrer is a metal blade that is slowly turned by the motor. This action disperses the microwave energy in a random pattern, which heats the food evenly. If the stirrer motor is determined to be nearing expiration, it should be replaced to halt the grinding noise.
  4. Turntable motorA very common cause for a noisy microwave is a worn out turntable motor. This is a relatively easy repair and will put an end to the noise once replaced.

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Jun 18, 2013 | GE JVM1490 Convection/Microwave Oven

1 Answer

My LG/Dometic MICROWAVE sparks inside the cooking area when turned on


see the next steps and follow with common sense: God bless you
Microwave is arcing If you see arcing or sparking inside a microwave, turn unit off immediately. Arcing can be caused by having something metal in the oven cavity touching a side, an oven shelf is touching the side of the cavity, an oven shelf support has broken, microwave waveguide, or bad magnetron.
If your microwave has a shelf in it, and you do not use it, keep it out. If one of the shelf supports breaks or comes out, the microwave will arc where the support was. You will have to sand the spot down, paint with appliance paint and re-install support. If the shelf shifts on the support and touches the side it will arc.
Your magnetron waveguide will either come out of the top, or side of the oven cavity. Some will have a stirrer in it(mostly top waveguides) with a panel over, or just a cardboard type cover over it. Over time, the stirrer cover can become warped from the heat which will expose the stirrer's metal shaft which will then cause sparking. These covers and stirrers come in a kit and can be replaced from inside the oven cavity.
Your cover over a side waveguide is coated with a substance on it, and overtime this coating can come off from the heat and moisture in the microwave. These waveguide covers are very easy to replace from inside the oven cavity. Touch up any paint that may have chipped or come off because of the arcing.
If your waveguide cover and/or stirrer are all OK, then the spark is coming from your magnetron. The antenna on your magnetrom has overheated and burned, sending the microwaves out at the wrong angle. If you catch this microwave oven repair early enough, you can usually get by with just replacing the magnetron. If the arcing has caused servere damage inside the waveguide, you will need a new microwave. Waveguides are not replaceable and most you can barely see into them, let alone sand and re-paint. In this case of microwave oven repair, when you remove the magnetron, you will see the burned antenna, or your magnetron will fail the test bel
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Jul 26, 2012 | Microwave Ovens

2 Answers

Keypad does not work after steam hits it


I always recommend that you use the vent fan whenever you're cooking on the stove top to keep heat, steam, and grease out of the controls and door panels.

If it does not dry out over time, it may need to be manually dried or blown out.

The keypad may be damaged or worn out, or control unit may be damaged.

Keypad failure can cause it to come on by itself, which can lead to a fire.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

May 24, 2010 | General Electric Microwave Oven

1 Answer

My maytag over the oven microwave just died;


most likely the power supply in the microwave is gone. the microwave die probably it is over the oven. heat from the stove cause the microwave to heat up and cold off more than it is on the counter.
counter microwave has fan and air slot in the rear. it keep the motor and microwave cool, and there nothing else to keep it hot. but the over the oven, the only ventalation is from the top. and with the added heat from the stove top and oven.

Apr 27, 2009 | Maytag MMV4205 Microwave Oven

1 Answer

LG LMV2053ST sound of sparks at top-front-right side.


It sounds like your varistor or low voltage transformer on your control circuit board is failing.

We repair these for customers nationwide with our guaranteed $39.95 service.

Please feel free to contact me directly if you need more help. And please mention your model number when you write.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Jul 12, 2008 | LG LMV2053 Microwave Oven

1 Answer

Noisy magnatron


First of all, if you press against the right side of the outer cover of the oven, does that lessen the noise? If so, it may be that a rubber cushion on the side of the HV transformer has fallen off.

If it had that hum but was not heating, I would first check the HV rectifier diode.

But since it's cooking, I would say your magnetron is on the way out.

Unless the warranty is about to expire, I'd continue to use it and watch and wait.

Apr 06, 2008 | Sharp R-520LK Microwave Oven

2 Answers

No Heat


ALL functions work.... just no heat? Is that right? I am assuming that the control (computer?, relays?) ARE supplying power to the magnetron.

IF everything checks out as you say, is the magnetron filament O.K.? (You have to disconnect it from the transformer to test it.)

If the magnetron transformer draws 8 amps, it sounds like it's O.K. cause if it was shorted, it would blow a fuse, and if it was open, it wouldn't draw ANY current.

Check it out, tell me more and let me know. No heat means the Magnetron isn't working.

Mar 30, 2008 | LG LRM1250 Microwave Oven

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