• ** 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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Maytag MMV5165BAS Microwave cooling fan won't stop running


Premium Member
Mar 1, 2022
Eastern Shore, Maryland
Model Number
More than 10 years
Hello, I have a Maytag microhood (MMV5165BAS). The cooling fan won't stop running. I have to turn the breaker off. This is the fan that runs on high for a few seconds at the end of a cook cycle. The microwave still works. It does have a vent fan but those buttons (on/off/speed) don't do anything to stop the fan. I researched it and replaced what according to the Tech Sheet inside the microwave is the Hood Thermostat, I discharged the capacitor first. On the online schematic the part I ordered was #17 DE47-20034A. However, this did not fix it. According to the Tech Sheet there is also a bottom thermostat and a cavity thermostat. The online schematic shows a total of 4 thermostats. I didn't want to spend the money on a new unit but it is 15 years old so there's a limit on how far I want to go. Any advice or guidance would be greatly appreciated.


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I think the one in your second picture is the humidity sensor. It's difficult to tell as the image is so small.

Humidity Sensor
humidity sensor DE97-00585A.jpg

I think this might be the cavity thermostat.

LINK > Thermostat DE47-20196c

Dan O.
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