Average Repair Rating: 3.1 / 5.0, 3 reviews.
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Door switch inconsistent operation for Open/Close sensing.
Ordered top & bottom micro-switches and mounting plate parts. Internet reviews could not find specifics if the issue was due to a top/bottom or combination of micro-switch or mounting plate failure. Pulled the plug. Removed the top vent assembly cover held in by 2 Phillips screws inside the vent. Removed the control panel held in by 1 Phillip screw at the top vent assembly area. Lifted control panel upward to release the catch and moved it off to the side - didn't disconnect any leads. Used a Torx bit to remove the door switch mounting plates at the front and pulled the plates through the opening from the control panel. Documented the wire color code connections, the top plate uses 2 micro's with one using both the closed & open contact. Installed the respective micros on the mounting plates and worked backwards with the wiring and removal steps. Once completed, the open/close sensing has worked every time.
This site was correct in description of what was causing the problem. I found broken white plastic parts in base of microwave, found they came from switch holder interlock support. Only reason it took me as long as it did is I did not make a diagram of the wires that I had removed.( would help to have easy access to wiring diagrams or have them on the internet ) But on the internet I found a Video by repairclinic.com the photo in the video pointed me in the right direction and allowed me to get my wiring in order the microwave then started up and runs correctly. As to the plastic parts found in the base of the unit, this unit was a floor model and probably had the door opened and slammed shut many times, breaking the Top interlock. Thanks to this site
Part of the support was missing. I had to remove the two switches and put them in the new bracket Had the switches reversed and started blowing fuses. Reversed them and changed the fuse and it started working.
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18 questions answered by our experts.
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Nyssa
April 16, 2018
Screen says shut door to start. The upper and lower latches (part that hold door shut) have sucked back up into the microwave. What do i need to fix this? Whirlpool customer support was no help.
For model number WMH32517AS2
Hello Nyssa, thank you for your question. There are two interlock supports on the inside of the cabinet of the microwave that hold the door shut. When the door is shut the prongs on the door activates the switches to allow the unit to operate. You will want to order the Support, Interlock (Top) Part Number: PS11745301 and the Interlock (Bottom) Part Number: PS11749178. You will also want to be sure the Interlock Spring and the CAM-PLATE are in the right positions as well. I hope this helps!
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Tim
January 21, 2019
Hi, I have a Maytag microwave. The top interlocking door latch has failed and not letting microwave latch and operate. I would like to know what parts to order and to replace both top and bottom latch, and directions.Thanks
For model number mmv4205ds1
Hello Tim, Thank you for contacting us. I have researched the model you have provided and have found the part you are looking for is Part Number: PS11745301 for the top interlock and Part Number: PS11749178 for the bottom. To get to those parts, you will first have to remove your grille. There should be a couple of screws holding it in place at the top. Once you have that removed you will see the screw holding the top of your control panel in. You will have to remove that and then also remove the one on the bottom as well. That will reveal your interlocking parts and micro switches to you. They just pull in and out of place on the switch housing. Good luck with your repair.
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Tanya
January 31, 2019
My microwave will not stay closed. The top latch is not connecting. I need to know which parts to order to repair this. (this problem seems to be on the microwave and not the door side.) can you help?
For model number MMV5208WW1
Hi Tanya,
Thank you for your question. If the microwave door is not shutting properly, there are some parts that you will need to check to see which ones are causing the issue. You will need to check the door switches, the top interlock support, the interlock, the interlock spring and the cam plate. I hope this helps. Thank you and have a great day!
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Patricia
February 4, 2019
Hi, our kitchen aid microwave model # is listed above. Door will not close. 1 of the 2 white plastic clip(top1) located on the microwave itself, not the door broke off. Can you please let me know the part we will need to order so we can repair microwave. Wont work. Thank you..
For model number KHMS2040WSS-1
Hello Patricia, Thank you for contacting us. After reviewing the model I show that the part number needed is PS11749178. Good luck with your repair!
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Wallace
January 21, 2019
When I open the door the light will not come on and the microwave will not work. Do I need to replace the upper and lower interlock switches. The part # are (top) ps11745301, Bottom-ps11749178. Is this correct parts to repair my problem.. thank you
For model number WMH53520CS6
Hello Wallace, Thank you for the question. I suggest testing the Door switches Part Number: PS2361113, PS2361111 and PS10057151. You can test them with a multi meter to check for continuity to see if one or more are defective. Thank you for your inquiry, good luck with this repair!
Maytag over range 2cu ft microwave. Door not latching. Can you give me the installation instructions for replacing the 2 interlocks and the interlock spring?
For model number MMV4203WB2
Hi Michelle,
Thank you for your question. To get to those parts, you will first have to remove your grille. There should be a couple of screws holding it in place at the top. Once you have that removed you will see the screw holding the top of your control panel in. You will have to remove that and then also remove the one on the bottom as well. That will reveal your interlocking parts and micro switches to you. They just pull in and out of place on the switch housing. Good luck with your repair.
Hi ! When you open door the microwave starts running. Door closed it stops. Doesn't seem safe to have door open and functioning .
For model number UMC5225DS0
Hello Mark, Thank you for the question. I suggest testing the door switches with a multi meter to determine what switch is defective. Thank you for your inquiry, good luck with this repair!
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Steve
September 19, 2019
When i try to cook by time or "dinner plate", i get reading to "open/close door … press start". These procedures don't work. Is this a door switch problem?
For model number WMH53520CB0
Hello Steve, thank you for inquiring. Yes, this would indicate a problem with either the 3 Terminal Door Switch part number PS10057151, or the Door Switch part number PS2361111 for your model. Good luck with your repair!
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Rommel
2 days ago
Can you please let me know which is the correct interlock support for the top as i checked it hosts 2 set of Switches one has 2 prongs and the other has 3 prongs
What is the model number for the interlock support switch and the respective switches.,. i have opened the panel and now only need to know the correct part numbers so that i can order for it.. URGENT !!! thanks
For model number YMH1170XSS4
Hi Rommel, thank you for the question. The top interlock support for your model is part number PS11745301. The door switches for the top interlock support are part number PS2338920, and PS2361111. Glad to be of assistance!
Microwave says close door but door shuts properly, microwave willnot work but light stays on all the time like microwave is running.
For model number GMH3174XVS0
Hello Valencia, Thank you for the question. I suggest testing the switches, Part Number: PS2338922, Part Number: PS2338920 and Part Number: PS2338921 with a multi meter to check for the continuity to see if one or more are defective. Thank you for your inquiry, good luck with this repair!
This door interlock switch is for microwaves.
Door interlock switch prevents the microwave from starting when the door is open.
Because the microwave shielding and interlock switches must be properly tested followi...
This three-terminal switch fits your microwave door. This part is mostly black in color and is about 1.5 inches with metal terminals. You might need to replace this part if your microwave is not heating properly or if it...
