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How do you replace a microwave oven door interlock switch?

Microwave will not function and I have seen on forums that gently pusing upward on the door would start it. I tried that and it did work initially but that is no longer the case. I want to see if it is worth repairing or replaceing

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  • Microwave Ovens Master
  • 14,553 Answers

Not a very expensive repair in our shop---you have to remove cover and locate the leaf switch or replace/repair it. The part is not usually very expensive and in many cases no soldering is involved.

It prevents the unit from being operated if door not closed etc.

Posted on Oct 30, 2012

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: stopped work when open microwave door no power now

I finally was able to fix similar problem. The "primary" door switch (top switch) had a burned contact inside the switch body, as well as burned surrounding plastic. It would no longer "click" and tended to stay in "closed" position. [The switch is a "normally open" design (NO).] When this occurs and the door is opened, the "monitor" switch causes the fuse to blow out. GE wants $50 for this part. However, I was able to find a universal design of microswitch at Fry's Electronics. It had the same rating (15 amp at 250 volts), same body size, both NO and NC terminals, but with a lever arm which I had to remove by opening the case. Cost was $2.47 + tax. (PRICELESS!). So far so good. I also had to buy a set of Torx driver bits for tamperproof screws to be able to remove the oven cover. (The hole in the end of the bit goes over the tamperproof pin of the screw).
I also viewed a YouTube video which was helpful at http://www.youtube.com/watch?v=YsWTCnACqdY

Posted on Nov 18, 2010

MicrowaveSvc
  • 9047 Answers

SOURCE: maytag microwave model#mmv500adb

A bad keypad may be worn out due to age, damaged, or it may have gotten wet or otherwise contaminated. Moisture and contamination can be caused by not using the hood fan when boiling on the stove top, spraying of cleaners, by storing the microwave in an unheated garage or shed, or infestation. I warn my customers to never spray cleaner directly onto the microwave keypad, since the liquid can get inside and "lock up" or even ruin the keypad or controller. Apply an alcohol-based cleaner (such as the purple kind) to a cloth (since paper towels can scratch) and gently wipe it off. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the ammonia will crack and distort polycarbonate plastics. If you or a friend decide to work on it, we have *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your base model number (without the suffix) here: http://tinyurl.com/gv383

Posted on Feb 19, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: LG microwave no longer heats!

It sounds as though you may have run the microwave while empty, which can damage the magnetron.

Not that I'm optimistic, but the first thing to try is a "hard reset". Unplug it from the power line for a few minutes, plug it back in, set the clock, then try again.

Let us know if the hard reset doesn't fix it.

Otherwise it likely needs a new magnetron.

Posted on Apr 08, 2008

landsend
  • 1066 Answers

SOURCE: Sharp Carousel will not turn on unless I lift gently on the door.

the door interlock switch needs adjusting or replacement

Posted on Mar 26, 2009

  • 1 Answer

SOURCE: Microwave Oven Door Spring Replacement

Remove the front panel by removing the screws located on the inside of the door (note hold door inplace, since it is heavy and will fall out after screws removed). Unscrew screws located on bottom of plastic retainer (2 each) Remove tension spring. Note 2 are included right and left. Note color of spring on end, different springs for different door types, stainless, black,beige or white. Replace all in reverse order.

Posted on Mar 26, 2009

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1 Answer

My oven suddenly stopped working


Most microwave ovens have up to 4 micro switches in the door latch, it's a safety interlock. These can go bad, and cause the oven to not function.
Micro switches are pretty inexpensive, and can be replaced. You need to open the oven, and then identify exactly which micro switches you need. Both my current microwave ovens have done this, and I've replaced the bad switches. They work fine now.

Jul 15, 2015 | Microwave Ovens

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Why has my Microwave stopped working? e130mh55gsa installed over stovetop. simple commands like cook for 1 minute, etc do not work anymore. manufactured January 2008. serial number 7g80305394. 12


Most commonly problem of Microwave Oven is the interlock switch in its door hinges. Since it is emitting microwave rays, it was built with such interlock switch to avoid exposure of human to said rays. So check first the continuity and functionality of said door switch.

Jan 10, 2015 | Microwave Ovens

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How to reset microwave


there is no reset function to look over, check safety interlock door switch, Has lamp & control Display lit?

Aug 19, 2014 | Panasonic NN-H965 Microwave Oven

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Miele H147-2mb not heat when microwave other function OK


Check the door safety interlock switch. More than 90% of problems like this are due to failed safety switch. Switch fails because people open the door when the oven is operating.

Mar 17, 2013 | Miele H147-2MB Convection/Microwave Oven

1 Answer

Why it's not functioning?


see this causes and fix it.
God bless you
f the microwave will not work at all, make sure power is on at the outlet and test the electrical cord. Test the fuse and replace it if it is faulty. Also check the door to make sure it closes properly. Test and, if needed, replace the fan. If the oven doesn't cook or cooks only intermittently but the display is on, check the door interlock switch, the thermal cutout (see the Applaince Controls Fix-It Guide), and the fan, replacing parts that don't pass the test.
If the oven keeps blowing fuses, check for a faulty door interlock or monitor switch.

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Oct 02, 2012 | Microwave Ovens

1 Answer

GE microwave oven model#JVM1441BH04 when you close door on switch activates and oven comes on. Only goes off when door is opened.


HELLO.

the problem your are experiencing with your microwave oven is a failed interlock switch.
Be careful when closing your microwave door. Slamming the door too hard is one of the main reasons that the interlock switch is damaged.

Slamming the microwave door shut can easily blow the microwave fuse, but they can also blow due to problems with the interlock switches.
A microwave oven will not function until the fuse is replaced.

Instruction on how to replace fuse on microwave.

1. Unplug the microwave from the electrical outlet to prevent electrocution. Place the microwave in a well-lit area to be able to locate the fuse.

2. Use a screwdriver to remove the outer cabinet of the microwave, and follow the power cord to the fuse. The fuse is located 2 to 3 inches within the microwave and is attached to the power board.

3. Observe the fuse to determine if it is blown. Blown glass fuses will produce burn marks on nearby surfaces, or the internal fuse wire will be black and melted, while ceramic fuses show no outward appearance of being blown.

4. Determine if a ceramic fuse is blown by testing it with an ohmmeter. If the ohmmeter reads zero ohms, your fuse is not blown. Other readings on the ohmmeter show that your fuse is blown.

5. Replace the blown fuse by popping it out of its holder, and snapping a new fuse in its place. Tighten the fuse clips by squeezing them together with your fingers.

6. Replace the outer cabinet of the microwave, and plug the microwave back into the electrical outlet. Test the microwave to see if it's working properly.

thanks.

Sep 22, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

The microwave door seems to be loose. The door will remain shut, but the light is on in the microwave and it won't run until I push upwards on the door. How can I tighten the door hinge?


you need a door interlock switch bracket adjustment; or, possibly one of the microswitches replaced on that bracket. it is behind that control panel.

May 16, 2011 | KitchenAid KHMS155LSS 1000 Watts Microwave...

1 Answer

GE Advantium Microwave section doesn't work.


The primary interlock switch on my Advantium has failed twice. The replacement part is available at: appliancepartspros.com part no. for my Advantium was AP2622452 and it cost $11.74 + $6.95 shipping.

For what it's worth, my nylon connector and wire covering were also scorched a bit but the last primary interlock switch lasted me for over a year.

Please note that I am not an expert at repairing appliances and that I assume no responsibility or liability for any attempt you may make to repair your own appliance.

May 30, 2009 | GE Advantium SCA2000B Microwave Oven

1 Answer

Sharp Carousel will not turn on unless I lift gently on the door.


the door interlock switch needs adjusting or replacement

Mar 26, 2009 | Sharp R-1480 Microwave Oven

1 Answer

Fuse


The Interlock Monitor Switch is an added
safety check on the Primary and
Secondary Interlock Switches. If the
Primary and Secondary Interlock Switches
allow the oven to operate with the door
open, the Monitor Switch will blow the
fuse.

You can get more information about adjuting the interlock switch from this link

http://136.166.4.200/contents/Microwave/LMVM1935xx/LMVM1935xx_Service_Manual.pdf

sections 7-11 thru 7-12 discuss the door interlock adjustment that will cause the 20A fuse to blow if it isn't set up right. I hope this helps you...

Aug 03, 2008 | LG LMVM1935 Convection/Microwave Oven

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