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Micro Door Switch

★★★★★
★★★★★
8 Reviews

Rated by 5 customers 

Easy 

30 - 60 mins 

Ratings submitted by customers like you who bought this part.

Get this part fast! Average delivery time for in-stock parts via standard shipping: 1.8 days.

 Fits your NV51K7770SG!
 Fits your NV51K7770SG!
PartSelect Number PS4131192
Manufacturer Part Number 3405-001034
Manufactured by Samsung
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Troubleshooting
This part fixes the following symptoms:
Doesn’t shut off | No heat | Won’t turn on
This part works with the following products:
Microwave, Range, Microwave Oven Combo, Wall Oven.
This part works with the following products:
Samsung.
Part# 3405-001034 replaces these:
AP4044834, 111698, 3405-000178, 3405-001034
Questions and Answers

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23 questions answered by our experts.
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Ron
February 7, 2019
My microwave comes on when the door is open. I have read your resposes to a couple others, one you mention three switched another only two switches, how many would i need for my model? I noticed in one response you mentioned a tech would be necessary but not on another suggestion. Would you elaborate please, i haven't opened up the assembly yet, i am a licensed electrician and feel i could do the work myself. Any precautions i should be aware of with this model? Thank you in advance for your assistance.
For model number SMH1816B
Hello Ron, thank you for your question. There are three microwave door switches in this unit. We usually recommend replacing them all, unless you want to test them to determine which one is bad. The switches and holder that they are mounted in come as an assembly by ordering Part Number: PS4239694. If you wanted to test the switches to determine which part is bad the individually parts are available. The top and bottom switches are the same, Part Number: PS4131192 and the switch in the middle is Part Number: PS4225460. This is a very easy repair. A lot of customers take this repair on, and its quite easy. Here are some links that might help! https://www.partselect.com/Microwave+test-door-switch+repair.htm. https://www.youtube.com/watch?v=czZHdMB5eEU. I hope this helps!

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RON BANISTER
April 26, 2018
My micro wave works ok but starts when door is opened !
For model number SMH1816S
Hello Ron, thank you for your question. If the microwave turns on when the door is opened you will want to replace the door switches on the unit. I would suggest replacing all three. 1 of part number DE34-20019A and 2 of part number 3405-001034. Good luck with your repair!

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Wiley
February 24, 2020
How many door interlock switch does this model have?
For model number Smh9187B
Hi Wiley, Thank you for your question. There are 3 door switches listed under your model number. There are 2 switches that go in the top and bottom of the switch holder. The part number for these switches is PS4131192. The other switch would fit into the middle of the switch holder. The part number for the middle door switch is PS4225460. We hope this helps. Thank you and have a great day.

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Carole
June 28, 2019
Door switch doesn’t make contact so it won’t go on. What do i order ?
For model number MC17J8000CS
Hello Carole, thank you for your question. Replacing this Micro Door Switch part PS4131192 for your model should fix the issue. We hope this helps.

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Debbie
August 2, 2018
Microwave stopped while running. Nothing will turn on. Everything is dark. The wall plug is fine and runs other devices.
For model number MG11H2020CT
Hi Debbie, Thank you for your question. There are a few parts that you could check to make sure they are working correctly. First would be your door switches. You should test them with a multi meter to see if they are working correctly, they should read 0 ohms to be working. Then you will want to test your fuse as well. Please keep in mind to be very careful and safely discharge your capacitor before doing any repairs on your microwave. Even with your appliance unplugged the capacitor could still badly shock you. I hope that helps. Good luck with your repair.

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Chris
April 12, 2019
Microwave doesn't shut off when door is open.
For model number SMH1713S
Hello Chris, thank you for inquiring. For this symptom you will want to replace the Micro Door Switch part PS4131192. We hope this helps.

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Bo Gibson
May 27, 2019
How to get to the door switch to replace it? When you close the door and push start the timer starts but will not come on.
For model number ME18H704SFS
Hello Bo, thank you for inquiring. There are two door switches for your model. Micro Door Switch part PS4131192 and PS4225460. For the symptom you are describing, you may want to replace either the Thermostat part PS4226431 or the Micro Door Switch part PS4131192. We hope this helps.

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Verna
January 25, 2018
My microwave works fine except it also starts running when the door opens. It could be one of the three door (relay) switches. I thought I would just replace all three. Which ones do I order for my model listed above?
For model number SMH1713S
Hello Verna, Thanks for your question. You would need the part numbers PS4225460 and PS4131192, these are the two door switches we show for your model. You will need a licensed technician to install these parts, however, as they can carry electrical charges even when you unplug the microwave. I hope this helps.

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John
February 6, 2018
Microwave light stays on with door closed and will not turn on. When i push the door down a bit i hear a switch click. I tested all 3 and the appear to work correctly. It almost seems their is not enough pressure to activate one of the switches. The door latch is functioning properly. Could this still be a bad switch.
For model number SMH1713S
Hi John, Thank you for your question. Yes it does sound like one of your door microswitches is bad. I would suggest testing all of your microswitches to figure out which one is not working. They should all read about 0 ohms to be working. Good luck with your repair.

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Kevin
August 31, 2022
Just finished cooking something that produced a lot of steam. When I took it out of the microwave, I noticed the display was blank and then suddenly came back on like it had lost power. I set the clock but then a half hour later, I tried to use it again and everything was blank and no lights in oven or microwave. The breaker didn't trip and using a voltage tester, I found that there was power going to the thermostat.
For model number NQ70M6650DG/AA
Hello Kevin, Thank you for the question. We suggest testing the Humidity Sensor with a Multimeter to check the continuity to make sure it is not shorted out or damaged. We hope this solves your problem!

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Customer Repair Stories
 Average Repair Rating: 3.3 / 5.0, 5 reviews. What's this?
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Sorry, we couldn't find any existing installation instruction that matched.
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.
Other Parts Used:
LEVER SWITCH-LOWER;OTR6, LATCH-BODY;JVM1950, PVM1 SWITCH-MICRO;MSWR,-,-,-,
  • Lynn from LOUISVILLE, KY
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
10 of 17 people found this instruction helpful.
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microwave ran with the door open
First I read through the customer comments, reviews, questions, etc. at Parts Select, which is always a good bet. Then I put "samsung microwave door switch replacement" into youtube and watched some videos. They don't even have to be for Samsung. From what I can tell, many of the appliance companies use the same design and the same junk parts, so watching a GE video is almost the same for example. Watch some videos to familiarize yourself with the steps. There are maybe six to disassemble and install the new part. I replaced all three switches. They are not expensive and to replace 3 is only 5% more work than to replace just one; you have to take the microwave apart in either case. UNPLUG THE MICROWAVE FROM THE WALL. Start taking it apart. I use my phone to take a picture of any thing I remove, unscrew or disconnect, especially wires, BEFORE I disconnect them. Thee pictures serve as a reference when I go to reconnect and reassemble. If I am uncertain then I check the picture. Good luck!
Other Parts Used:
SWITCH-MICRO;MSWR,-,-,-,
  • david from WASHINGTON, DC
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Screw drivers
4 of 4 people found this instruction helpful.
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The microwave would not turn on or would run with the door open
Other tools that are usefull long needle nose pliers, long thin blade screw driver and small magnetic flashlight. Place the microwave on a work bench and remove the case it cover 3 sides. Place the microwave on a chair so it can stand with the controls up. You are replacing the lower door microswitch. The switch is located behind the control panel in the lower part of the area. The switch is several inches inside this area and your hands will not fit. Take care when moving wires and a couple of sensors. Use the thin blade screwdriver to release a tab holding the switch in place. Do not break this tab. Take the needle nose pliers and remove the switch. Put the wires on the new switch, open the door a short distance so a door lever moves enough to put the microswitch back into the bracket.
  • Raymond from TROY, OH
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Screw drivers
4 of 6 people found this instruction helpful.
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Our microwave would turn on after the timer was set but only the light would turn on, nothing else.
I replaced all 3 door switches. Once you remove the top vent then remove the panel. Then remove the two screws holding the door switches in place and pop them out and replace them. It was tricky getting around all the wires but eventually was able to get around them. Took less than 20 mins to do and was less than $40 to fix. Much better than having to replace our over the stove microwave.
Other Parts Used:
SWITCH-MICRO;MSWR,-,-,-,
  • Adam from GILBERTS, IL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
3 of 3 people found this instruction helpful.
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Turntable started turn when door opened, then unit wouldn't run when start was pressed
Unplugged the unit. With a screwdriver removed two screws on the top plastic vent. This exposed the screw holding the control panel. Removed that screw to access the switches. Removed the visible connected wiring from the switches. Grabbed each switch with pliers to gentle pull them from their holders. Inserted new switches and reconnected wiring, ensuring the correct orientation of switches in their holders.
Recommend replace all three switches.
Other Parts Used:
SWITCH-MICRO;MSWR,-,-,-,
  • Phil from RALEIGH, NC
  • Difficulty Level:
    Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Pliers, Screw drivers
1 person found this instruction helpful.
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Customer Reviews
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★★★★★
★★★★★
8 Reviews
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Model Cross Reference
This part works with the following models:
PartSelect Number: PS4131192
Manufacturer Part Number: 3405-001034
Brand
Model Number
Description
Samsung
CM1012B
Microwave - Samsung Microwave Model CM1012B Parts
Samsung
CM1012BXAA
Microwave - Samsung Microwave Model CM1012BXAA Parts
Samsung
CM1020B
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CM1020BXAA
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Samsung
CM1022B
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Samsung
CM1022BXAA
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Samsung
CM1029B
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CM1029BXAA
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Samsung
CM1229B
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Samsung
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