Question about Sharp KB3300JS Stainless Steel Electric Kitchen Range

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My microwave (Sharp KB 3300JS drawer) stopped working last week. It started making a very loud buzz (like the normal operating noise was increased by 90%) while operating. I opened the drawer, light and fan came on (like its supposed to). Closed it, tried running it again, same loud buzzing. Second time I opened the drawer, no light, no fan. Closed and tried again. this time, the timer counted down, but nothing else happened. Stove and oven work just fine. Any ideas? fuse? relay?

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  • Barrett Palumbo
    Barrett Palumbo Jan 04, 2011

    Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: TIMER IS BUZZING NON STOP.

how old is the oven? does it have a analog clock? If it does then turn the stop time clock and the buzzing should stop.

Posted on Nov 04, 2008

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blueextc3221
  • 15935 Answers

SOURCE: kenmore gas stove makes a buzzing sound

Is the door locked?? Is it an electronic buzzer sound??

hold the CLEAR button for 3 seconds - the door will unlock.
open the door - and press CLEAR for 3 seconds.
Error code may come up.... close and re-open the door.

Are there any indications on the display?

Or is this a mechanical buzzing from underneath? in this case your gas regulator's diaphragm has failed.

If the above reset doesnt wokr (and the sound is electric) your circuit board will need replacement.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Posted on Jun 09, 2009

  • 3 Answers

SOURCE: Microwave does not make any noise, but timer counts down

Probably be just as cheap to get a new microwave.

Posted on Jul 11, 2012

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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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1 Answer

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

Sharp sound bar buzzing


test 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 turntable motor. This is a relatively easy repair and will put an end to the noise once replaced.

Read more: http://www.appliancepartspros.com/repair-help/microwave-repair-help.html#13#ixzz2hVe8AHvJ
http://www.appliancepartspros.com

Oct 12, 2013 | 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.

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Someone would have to open the unit to "hear" where it is coming from, possible fan issue or even the power unit inside.

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buzzinsg / humming / loud or louder than normal .is probably the mag / it has failed and the trans is making that noise . if older than 5 yrs I would replace ans the mag is 100.00 + and w / labor you have paid for a new on but have the old one .**** ..

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I have Whirlpool GH 7155XHS-1 and it started making loud noise when used. Food still gets warmed but makes a loud noise when food is being warmed. Started a week back. Please let me know if you know the...


The unit is failing. Probably the megatron tube. IT can pass quickly or slowly. I had a Sharp that lasted about a month before conking out on me at a most in opportune time: Dinner for 8 and it was late! Take caution. Start shopping.

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1 Answer

Loud buzzing noise when operating


This is most likely a shorted high voltage rectifier diode, but the magnetron may be bad as well.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)


http://www.gallawa.com/microtech/mag_test.html

Info on ordering Sharp UK parts / spares is here.

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

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1 Answer

Loud noise


If you mean a loud buzz that cuts on and off as the oven works, it is probably the outer metal cover vibrating as the magnetron powers up and down. Try holding/ pushing/ poking the metal cover while the oven is working, if the noise abates or goes away, this is the problem.
You may get relief by simply tightening the screws securing the cover, if not, maybe a little careful insertion of a thin strip of cardboard or similar, at the point the vibration occurs, may dampen it. Good luck.

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