Question about Kenmore 66469 / 66462 / 66464 Microwave Oven

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High pitched hum/buzz

My Kenmore Elite microwave (countertop model) is making a high pitched humm or buzz, almost can't hear it at all. It's louder when you open the door. It works just fine except the sound. We unplugged it for now. Any suggestions?

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  • Sandy Brill Nov 29, 2006

    By high pitched I mean it's definitely a different sound than what it sounds like when it's running. When it's not running the sound is so high pitched it's barely audible unless you open the door and almost put your head inside.

    Since my first post, it is now making the noise when it runs too. It's not very loud, but certainly different from its normal sound.

    The sound may be about the same frequency as the beep, but not as loud when the machine is not running.

    My husband thinks it would cost less to replace it than to fix it. I hate to contribute to the local landfill, and would rather fix it.

  • Anonymous Mar 21, 2014

    Our Kenmore Elite 88523 buzzes very loudly with door shut. Putting a glass of ice cubes in the oven on reheat will be boiling with five seconds. It does not have the normal operating sound. Built in Malaysia, not a good thought.

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  • Kenmore Master
  • 9,098 Answers

By high-pitched, you mean it is not that same frequency as when it's cooking? Is the tone near or the same as the beep you hear when you press a key? Please post a little more information so we can help better.

Posted on Nov 28, 2006

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Posted on Jan 02, 2017

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To allow us to help you effectively (at no charge), please post a NEW problem to FixYa, and please include your brand name and the full model number from the tag in or on the unit, your symptoms, as well as the answers to these questions:

- When you try to microwave are the inside light, internal cooling fan and turntable all working?

- Is there any unusual noise or is it louder or quieter than normal?

(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.)

We have a sound clip here of what a microwave should sound like when the cooling fan and high voltage section are working.

Note that a
full Sears/Kenmore model number has 3 digits, a dot, then 8 more digits, such as ###.########

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Possibly, the "fault" was the buzzing in the first place! Buzzing is usually a cabinet vibration caused by magnetic fields from the "gubbins". If the buzzing should occur again, try pushing/ pulling/ poking the cabinet while the oven is running, you may find a position that causes the buzz to stop.
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