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Customer Questions and Answers for Microwave Door Interlock Switch Kit (2-Pack) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM9328431
Manufacturer Part Number: 4392027

Microwave won't start or runs only when door is pulled? Replace faulty door interlock switches. This 2-pack covers top and bottom switches. DIY repair.

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Questions & Answers

For Whirlpool Microwave Door Interlock Switch Kit (2-Pack) (Part Number: OEM9328431)

1 Answer

Hello Larry. You need to remove the outside cabinet and see what parts are broken and needs to be replaced.

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Bill for Model Number JKP90DPWW Whirlpool Microwave/Built in Combination

My 19 year old microwave, intermittently, will turn on when the door is closed. The light/carousel go on but the heating element will not. It can go a day or two and act normally, then all of the sudden it will turn on (not heating element). Other than that it works fine. If I close the door with food in it, the carosel/light will go on before I enter a cook time, etc. It allows me to enter the cook time and operates properly until it times out, then the carousel stays on until I open the door. I'm thinking it is one of the secondary switches? Thanks!! Bill

Stephen N for Model Number Whirlpool Microwasve MT4155SP

I have just finished repairing a broken plastic lever (part nr. 8205451). I am now reinstalling the control panel and the latch board. My problem is this: I do not see where to position the upper Door Interlock Microswitch. The other two microswitches (the lower Door Interlock Microswitch and the Monitor Microswitch) have identifiable brackets. There doesn't seem to be a bracket for the upper one within the latch board (part nr. 8185271).

1 Answer

Stephen, There is a sloted area at the top of the switch holder that the upper switch will go into. this is non the narrow part of the part next to where the latch on the door would slide into it.

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1 Answer

Frank, With the display only having 2 dots, as long as the control board is getting power to it then the control board would be faulty and need to be replaced. The door switches would not cause the display to have 2 dots.

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1 Answer

Hello Scott. Based on the information you provided, it sounds like a switch 4392027 issue with the unit. You need to remove the switches and test the 1 at a time and see which switch is bad in the unit. If all switches test good, then look at the latch and spring assembly.

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1 Answer

Hi Terry. The fan and the turntable are controlled by the primary switch part # WP56001036 that has shorted closed causing the issue you have. It has the blk. wire and the red wire connected to it. Obviously it will react the same as if you removed both wires and jumped them together. You remove the upper grill. This will allow access to a metal cover plate above the controls, remove it. Then slide the control panel up and hinge out towards you. You will need to remove the green ground wire and note all wire connections to the board. This allows you to open the door and remove the inner side latch mount screws and lift the latch assy up and out from the inside of the microwave cavity. Then you can replace the micro switch in question. Thank You.

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1 Answer

Hello Mike. Based on the information you provided, it sounds like the secondary switch 4392027 is bad and will need to be replaced in the unit. Make sure the wires are repaired before installing the new switch into the unit.

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