• ** 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

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Whirlpool "over the range" microwave makes intermitent electrical arc sounds.


Aug 11, 2016
Rochester, Ny
Model Number
1-5 years
Hi, my Whirlpool WMH53520CH0 "over the range" microwave makes loud buzzing noise when running (sounds like electrical arc). It use to make the intermittent arc sounds and still work none the less. However, It now runs for a few seconds and shuts down and digital screen goes black. I unplug it and plug it back in and the digital comes back on and the microwave works. But the problem persists and turns off after a little while. It gets food hot, the turn table turns, the light goes on...it all works fine except the aforementioned problem. The unit is out of warranty now. I have owned it for less than 2 years. I'd like to fix it if possible. What do you think need to be replaced? Thanks!