If your Samsung microwave's door isn't latching correctly or shutting securely, it may be time to replace the door interlock switch lever. This essential part activates the interlock switch when the door is completely closed, ensuring safe and efficient operation of your appliance. Due to the possible risk from high-voltage capacitors within your microwave, it's recommended to have this part installed by a professional service technician. This product ensures that your microwave remains in top condition, contributing to its longevity and performance. Designed and manufactured by Samsung, you're guaranteed a quality, reliable product. Replace your dysfunctional part with this and see optimal functioning restored to your Samsung microwave.
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Troubleshooting
This part works with the following products:
Microwave, Microwave Oven Combo.
This part works with the following products:
Samsung, Maytag, Jenn-Air, Kenmore.
Part# DE66-90106B replaces these:
DE66-90106B
Customer Repair Stories
Average Repair Rating: 4.4 / 5.0, 1 reviews.
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Microwave would not start when door closed. Sometimes you could push in or jiggle door and it would work for awhile and then it woud stop again. I knew it eas a door switch issue but wasn't certain which of the 3 or the body latch itself.
I removed the body latch assembly and found the bottom micro switch (NC) terminal burnt and loose. I replaced and working perfectly fine now. Easy diagnose and easy repair.
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3 questions answered by our experts.
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Venicio
November 13, 2018
When I open my door the tray runs in reverse and light stays on
For model number Smh2117s
Hello Venicio, Thank you for the question. This normally indicates an issue with one or more of the Micro switches. Part Number: PS4225460 (1 required) or Part Number: PS4131192 (2 required). I suggest testing the switches with a multi meter to see if they have continuity. Hope this helps, good luck with this repair!
Switch causes the problem, it does not start the microwave but the timer still works and everything else seems to be fine and what is the function off all there switches
For model number Me16k3000aw
Hello Perry, Thank you for your inquiry. These are the switches that work with the control board to tell if the microwave door is shut, as the microwave will not start if the control board does detect the door is shut. You can test all 3 with a multimeter. Good luck with your repair.
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Rod
January 6, 2026
Are the 3 switches for the microwave door all the same or is 1 different than the other 2
For model number SMH1816S
Hello Rod, thank you for reaching out. According to our research, the three door switches are not all the same; one is electrically different from the other two. The door switch, part number PS4131192, situated at the top and bottom, are identical. These are normally open, meaning the circuit is open when the door is open and closes only when the door is shut. While, the door switch, part number PS4131191, located in the middle, is different. It is Normally Closed, meaning the circuit is closed when the door is open and opens when the door is shut. We hope this information helps!
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