Question about LG LMHM2017ST 1000 Watts Microwave Oven

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Microwave wont work without lifting upon door.Now has stopped completely

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Bad door switch

Posted on Dec 16, 2014

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Posted on Jan 02, 2017

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1 Answer

Suddenly microwave stopped working


(would really like more info- digital number dead as well?)

(assuming completely dead) Could be a couple of things:
- blown fuses (inside, relatively easy to replace, std size avail at Raioshack) <-- most likely
- cut/loose power cord connection inside.
- (unlikely but worse case scenario) Door was closed crooked- one tong hit one door switch before the other- causing a short circuit internally that "self destructs" the microwave to prevent it ever operating with an open (or even crookedly ajar) door, irradiating any users. Typically it just blows the fuses, but if fuses blow immediately upon replacing and turning power on, then possibly one of the switches fused or melted internally, and needs to be replaced.

Jan 28, 2014 | Whirlpool MT4155SP Microwave Oven

1 Answer

Clock and timer works but microwave wont heat r power on.. everything seems to work fine microwave just wont come on to cook


This is usually caused by either a bad door switch or a loose door switch mount, which are pretty simple problems to fix.

Even though a door switch clicks, it may still be bad inside.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.




e78b4f2.jpg

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

dee77f7.jpg

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

See:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Jan 10, 2010 | Kenmore Microwave Ovens

1 Answer

Microwave wont work


The microswitch operated by the door catch will need to be repositioned by a serviceman. Do not remove the microwave cover yourself as they are potentially lethal even when not plugged in to a power source because of a large capacitor holding high voltage charge.

Sep 21, 2009 | Frigidaire FMV156DC Microwave Oven

1 Answer

Must lift door of microwave to operate microwave.


This is usually caused by either a bad door switch or a loose door switch mount, which are pretty simple problems to fix.

Even though a door switch clicks, it may still be bad inside.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

dee77f7.jpg

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

If you only need a switch, you can order a universal type here for $5 postpaid.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Jun 05, 2009 | Sharp R-9H66 Microwave Oven

1 Answer

WON'T LIGHT UP


Did you check the fuse box?

Jan 13, 2009 | Whirlpool MH7140XF Microwave Oven

1 Answer

My sharp r520lw microwave stopped working.before it stoped working completely it had a problem with the door switch.if i lifted on the door it would work again.now it doesn't work at all.it won't even let...


This is usually caused by either a bad door switch, a loose door switch mount, or occasionally a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switchor mount trouble can be caused by slamming the door or by opening thedoor while it's cooking without hitting the Stop pad first.

There areplastic mounts inside the microwave which hold the door switches andonto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it'sa broken tab on the switch holder, allowing the switch to rotate justout of position. This tab can be hard to see, since it is under thebottom edge of the switch.

One test that sometimes helps is togently lift up (and/or push down) on the door or handle as you try tostart it. If it works or tries to work, then it's a door switch mount ordoor alignment issue.

If you or someone you know decide to lookinto it, we have critical information on safety, disassembly and doorswitches at our site, and our link is at our listing here on FixYa:.

You can usually find exploded views and order parts by entering your model number here at the Sears parts site.

The best place to order Sharp parts is Tritronics.

If you only need a switch, you can order one from us for $5 postpaid.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Sep 12, 2008 | Sharp Microwave Ovens

1 Answer

Microwave Oven Problem


Quite often this is due to a bad door switch. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure. It's probably not actually heating with the door open, but better safe than sorry! If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) 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 full model number (without the suffix) here: http://tinyurl.com/gv383

Apr 10, 2007 | GE JEM25 Microwave Oven

1 Answer

EMERSON MW8773SL


Quite often this is due to a bad door switch. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk If it's NOT a bad door switch, it may be a stuck relay or other problem on the control panel / circuit board. We repair these control panels nationwide for $39.95. For details on the repair service, see our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

Mar 23, 2007 | Emerson MW8775W Microwave Oven

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