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Bright flash and loud buzz while operating - Sharp Microwave Ovens

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The oven is at a service center for repair.

Posted on Feb 09, 2010

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Posted on Jan 02, 2017

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When microwave is started, why does it make a loud buzzing sound--like a Skil saw sounds?


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Feb 03, 2016 | Whirlpool Accuwave Microwave Oven

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Buzzing noise


follow this steps 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 t
urntable motor. This is a relatively easy repair and will put an end to the noise once replaced.

Oct 23, 2013 | Panasonic Microwave Ovens

1 Answer

Makes a really loud buzzing noise during operation


Unit uses a Magnetron and likely a power board called an inverter to run it. Someone would have to open the unit in a way where they might pinpoint where the sound is coming from and then take action--does not of course sound normal or good to me.

Dec 10, 2012 | Samsung SMH1622W

1 Answer

LOUD BUZZING NOISE AND THE ANSWER I RECEIVED WAS FOR A DIFFERENT MODEL. CAN I FIX IT MYSELF?


If the loud buzzing noise is present when cooking food, the magnetron is the likely cause, some models are louder than others. But if the buzzing noise is there without the microwave running it should be checked. No! this something that should be checked by a professional for safety.

Mar 17, 2012 | GE Monogram ZEM200SF Microwave Oven

1 Answer

Kenmore microwave Model No. 721.62463201 runs but does not heat and has a terrificately loud buzz. All lights displays are normal


Hello there:
There's no heat, but it buzzes loudly When the microwave won't heat, but you hear a loud buzz, you usually have a defective power diode, high-voltage capacitor, or magnetron. I recommend that you consult with a qualified appliance repair technician for help in determining the problem and deciding what to do about it.
And if you have your warranty for this you can use it to ok
Hope this helps best regards mike

Nov 19, 2010 | Kenmore Microwave Ovens

1 Answer

My Whirlpool MH2155XPB2 microwave just started making a loud buzzing sound when in use. I also am smelling an electrical burn smell.


please dont use this microwave any more its about to go with a very big bang and maybe a bright flash??? my bet is the capacitor is leaking, thats why it smells? realy what you have here is a fire wating to get started, fed by the 1000,s of volts stored in the cap thats just bursting to get out, and its going to very soon, all in one go too!!!! trust me,,, when the cap blows its going to sound like a very big rifle has been fired off in your kitchen, and if you think it smells now???? wate and see what it smells like after its gone bang!!!! its a comon fult,,,,,bump it now!

Oct 21, 2009 | Whirlpool MH2155XP Microwave Oven

1 Answer

Loud buzzing noise with Whirpool microwave oven when it comes on. All lights, heating and fan seems to work but not sure why loud buzzing. What is the problem?


The loud buzzing you hear is the sound of the magnatron tube.That is what emits the microwave radiation and buzzing should be normal. The mag tube may be nearing its end at witch time you will hear no buzzing and hence no heating of foods. Replacement can be costly depending on the model so most people just opt for a new one. Hope this helps

Jul 30, 2009 | Microwave Ovens

1 Answer

Kenmore microwave making loud buzzing sound.



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


Mar 05, 2009 | Kenmore 62622 Microwave Oven

1 Answer

Makes a loud buzzing noise and does not get hot


Have seen this many times.

Sounds like a bad CAP since a bad diode would blow the fuse and a bad mag would likely do the same thing.

Since yours is making the loud 60hz buzz you need to replace the capacator that will likely fix the problem. A $10 fix

Jan 06, 2009 | Kenmore 62622 Microwave Oven

1 Answer

Buzzing noise and flashing


Some units have a silica plate covering the waveguide opening. If it get burn spots on it, it'll do that. Remove the plate and try the unit. If it's OK, go to your MW repair shop and order a new plate.

Remember... always cover your food...

Geno

Mar 10, 2008 | Emerson MW8102SS 1100 Watts Microwave Oven

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