Question about Maytag MMV4205 Microwave Oven

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Sounds like a truck engine braking. Sometimes like a buzzer at a basketball game.

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With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.


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.

Accessing some components for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download GE owner's manuals and installation instructions here.

You can download owner's manuals and installation instructions for several brands (including Amana, Frigidaire, Jenn-Air, Kitchenaid, Litton, Maytag, Roper, Tappan, Thermador and Whirlpool) here.

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, it's probably okay)

http://www.gallawa.com/microtech/mag_test.html
(even if the magnetron passes these tests, it can still be bad. If you have high voltage and the diode is good, assume the magnetron is bad)

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

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

Sounds like a truck engine braking. Sometimes like - dee77f7.jpg

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

Posted on Oct 06, 2009

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1 Answer

The buzzer stays on after we just had a short power off.


Remove power to the microwave for few minutes, press down all the front panel buttons to drain off residual voltage so as to reset the processor or memory..
If the fault repeats, try to shut off power overnight , if not there is error on the processor to output the buzzer.

Jan 24, 2013 | GE Microwave Ovens

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Can you disable the chime at the end of the time cycle on my microwave


Yes , You can disconnect the chime or SOFTEN the chime by just insulating the gong if this is mechanical type or to disconnect the buzzer if this is the electronic control board

Jan 10, 2013 | Microwave Ovens

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Electrolux high speed oven quit beeping


The buzzer on the keypad control has opened, or one wire has come off due to poor soldering, or the voltage to the buzzer is missing.

Jul 18, 2012 | Electrolux ICON Microwave Combination Oven

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My microwave beep went away, is it locked


If the microwave is not working at all the main control panel or the touch pad can be faulty. However if only the beep is not heard but the microwave works fine then the buzzer can be changed. remove the board, check the buzzer with an external voltage after removal to confirm . If not the buzzer driver can be faulty.

Jan 10, 2012 | Microwave Ovens

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Whirlpool Microwave GH5184XPB - just off warranty. Buzzer no longer sounds when cooking is done. Can I access the control panel and replace the buzzer?


It's more likely to be a software problem, not hardware.

First, I'd give it a good reset by unplugging it for a minute or so, then plugging it back in, and trying it again.

If that doesn't work, check the settings on the menus. It may be turned off. Consult your owner's manual.

If for some reason you don't have yours, you can download Whirlpool owner's manuals and installation instructions here.

Feel free to contact me directly (and please remind me of your full model number) for more information & help or see our Web site.

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

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

Apr 19, 2010 | Whirlpool GH7145XF Microwave Oven

1 Answer

The audible buzzer no longer sounds


most likley the buzzer has died on you, however its not very smart to try to fix it yourself as there is very hight voltage inside the microwave even after its been switched for for a long time, if you realy cant live without a buzzer going off, brop it into a repair man to fix it for you
is it realy worth the risk of killing yourself just to save a fuw bucks, also microwaves are so cheep now is it realy worth spending good money getting it fixed ?? a new one may be the best way forwards

Oct 25, 2009 | GE Profile Spacemaker II PEM31 Microwave...

1 Answer

Hotpoint microwave is loud.


your transformer windings are loose and the 60 cycle frequenct is setting up a mechanical vibration, you can try and look for anything loose inside the unit, but if the transformer windings get loose theres really no fix but to live with it

Oct 06, 2009 | Maytag MMV4205 Microwave Oven

1 Answer

Can't stop timing buzzer from ringing.


remove buzzer from board if all still runs well or new pc.board is to be installed.

Sep 14, 2009 | GE Microwave Ovens

1 Answer

Steady buzzer noise


It may be as simple as a loose screw in the cover causing it to vibrate, or as serious as a failing magnetron.

While a microwave should never be left unattended, it's even more important when one is exhibiting a failure or any odd behavior.

So play it safe and stay with it while it's running.


It may be best to practice watchful waiting and wait until it fails "harder" or more seriously.

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

Jan 01, 2009 | Emerson MW8777W Microwave Oven

1 Answer

No sound or buzzer


If your model doesn't have a "beeper volume" button, maybe you can reset it by unplugging it for about a minute or so then checking it. If you don't have your owner's manual, you can download it from here: http://genet.geappliances.com/DocSearch/Dispatcher

Feb 10, 2007 | GE JVM1440 Microwave Oven

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