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Customer Questions and Answers for Microwave Diode by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM20352870
Manufacturer Part Number: W11256462

Microwave won't heat but hums loudly? The diode regulates power to the magnetron. Test with multimeter—reads one direction only. Moderate DIY repair.

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Questions & Answers

For Whirlpool Microwave Diode (Part Number: OEM20352870)

1 Answer

Kit, The amount of voltage drop will not determine if the diode is bad. If the diode has continuity then it is good.

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1 Answer

Kristopher, Yes, if the unit is not heating and there was a pop you will want to test the diode as being the issue.

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1 Answer

Al, your model does not use a transformer, capacitor, or diode. Instead it uses an inverter control W10217710 to send voltage to the magnetron.

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1 Answer

AJ, The diode will show open one way and closed the other way. For this issue you will want to check the door switches on this issue.

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1 Answer

Gil, The diode will be located on the inside of the unit behind where the control panel will be. What is meant by discharging unit would mean to discharge the capacitor of the unit.

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1 Answer

Hello Ken! In order to test the diode you'll need to have a multi reader that has a diode setting. More than likely you'll have to hook up a 9v battery in series with the diode in order to get a good reading through the diode. Hope this helps!

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1 Answer

Hanna, In order to access the diode you will need to pull the unit down from installation and take the outer cabinet off. You will see a capacitor which the diode will be attached to the capacitor. Make sure that you discharge the capacitor before changing the diode.

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1 Answer

Rob, The diode for this unit will be part number W11817793 and is a picture of it on the webstie. The diode connects to the capacitor and then to screws to the metal on the unit .

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1 Answer

Tim, replace the diode, make sure when you attach the eyelet end to the cabinet frame, sand the area around the screw, and make sure everything is good and tight as possible. Also check and make sure there are no bare metal spots or arc marks on the cabinet frame or area, if there are make sure you touch up the areas with T/U paint. You also want to Carefully test or replace the capacitor.

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