• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

    Jake

P100N30ALS3B Buzzing Hamilton Beach Microwave

Konrad Szwab

New member
Joined
May 27, 2018
Messages
1
Location
TX
Model
P100N30ALS3B
Brand
Age
1-5 years
Hello,

I have a Hamilton Beach microwave that started making this ugly buzzing sound when cooking (heats food fine). I disconnected the fan and turntable, noise persists.

I bought another identical magnetron, the same noise, maybe a tad less.

Please enjoy referenced video at https://www.youtube.com/watch?v=oBzByVx79KE&feature=youtu.be

Could it be that the replacement magnetron has the same issue ?

Bad transformer ?

Other bad part, capacitor ?

Help is highly appreciated.

Thank you.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,513
Location
Ontario, Canada
Hi,

I can't listen to the video from home.

making this ugly buzzing sound when cooking (heats food fine). I disconnected the fan and turntable, noise persists.
If heating is fine I would suspect the high voltage transformer. It is a whole bunch of thin plates all glued together. If one or more of the plates loosen they can vibrate and make a terrible noise when cooking.

jeff.
 
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