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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

NV, Based on the information provided it does sound like a door switch issue and I would advise changing all three switches together.

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1 Answer

Janet, the switch kit 4392027 is compatible with your model and contains 2 of the switches used in your appliance. The fuse WP4375321 would be available separately from the kit.

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Larry for Model Number Maytag MMV6178AAS

My Maytag MMV6178AAS has an internal (cavity) light that illuminates when the door is open and when the oven is operating. The light recently stopped working. I changed the bulb; however, now the bulb remains illuminated under all conditions. I am not able to extinguish the light under any circumstances, but largely because there is no external control. Does this Door Interlock Switch (Part #AP3109474) control the operation of that cavity lamp? If so, I will place an order. Also, can you identify the halogen lamp in that light with a part number? The bulb I bought to replace it appears to be much lower wattage. Thank you in advance.

1 Answer

Larry, After reviewing the schematic for your model the light is controlled thru a relay on the main control board. Unfortunately, this item has been discontinued by the manufacturer and no substitute has been offered. At this point, there is no fix so the bulb will eventually burn out. My advice is to use it until it will not heat anymore then you will have to replace.

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1 Answer

Hello Richard, If adjusting the door switch holder assembly does not correct the issue you will need to replace all three door switches.

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1 Answer

Mark, You will want to remove the air grill from the unit and behind the air grill will be a screw that you remove from the control panel. Once removed you will be able to lift off the control panel and will have access to the door switches.

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Franklin for Model Number KCMS2255BSS

When pressing the button to open the door on this three-year old KCMS2255BSS Kitchenaid microwave the catch does not move away sufficiently to let the latch release the door. The result is that it could take multiple presses of the button to actually release the door. This should be a reliable one-time only action. Adding lubricant has minor benefit but still does not release the door on the first press. What is the fix for this door problem?

1 Answer

Franklin, It sounds like the lever mechanism may be at fault with not pushing the latch up far enough. Unfortunately the manufacturer does not supply any parts for this unit other than trim kits and turntable.

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1 Answer

Danny, with the switch pushed in the switch will have continuity. Without the switch button being pushed in then no continuity.

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Dan for Model Number KCMS1555RSS1

The Kitchen aid microwave oven has a sticking door. I remove the outside cabinet to see what the issue is. It appears that when I push the door opener handle in, it doesn't trigger/release the black door catch enough to open the door. If I gently assist with a fatheaded screw driver, the door opens. It looks like either the door opener need to raise higher to release the door catch or there must be some electronics the engages and releases the door catch. thoughts? Dan

1 Answer

Dan, There are no electronics involved, it's all mechanical. Press on the button, the button engages the WP8205451 door latch bracket, the bracket rises and lifts the bottom of the door latch assembly and the door opens. You're going to need to remove the latch bracket and check for broken or worn out pivot pins on the sides of the bracket, and the pivot area of the control panel frame to see if it has bent or moved over the years of usage.

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