Question about LG LMV1680ST Microwave Oven

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Micowave turn light is on but not heating.. - LG LMV1680ST Microwave Oven

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Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Posted on Sep 08, 2010

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3 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9047 Answers

SOURCE: GE Profile micowave model JE2160SF001 won't 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.

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.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

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

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

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.

Posted on Jul 25, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: micowave is getting power. turn table is worging

Some questions to help you or someone you know troubleshoot it:

When you hit "Start" to microwave, do the inside light, cooling fan, and turntable all come on?

If not, then you probably have a bad door switch or door switch mount and should see these files:

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

If the inside light, cooling fan, and turntable are all coming on, then the problem is in the high voltage section, and then the next questions arise:

Any unusual noises? Is it louder or quieter than usual?

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

If there's no unusual noise, it may just be a bad connection at the magnetron.

Here are some links you or someone you know can use (in order given) for high voltage section test help, but read the safety warnings first:


http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)


http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)


http://www.gallawa.com/microtech/xformer.html

You can order parts here.


Accessing some parts may require you to pull the oven from the wall and remove the cover.

If so, the installation instructions are very handy, and it's best to have

two people since the microwave can be heavy and awkward.


You can download an owner's manual for yours if it's pictured here.

Otherwise, for more help from Magic Chef / Ewave see here or their contact page.

If nothing else, you can save about $75 for a home visit by taking it to the shop yourself.

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

Posted on Jan 11, 2010

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If it looks and sounds like it's running but doesn't heat, one possibility is that the magnetron tube has burned out. This is the electronic tube that emits the microwave radiation. Another possibility is that the control circuit that regulates turning the magnetron tube on and off for defrosting and lower-than-100-percent heating rates could be faulty. Try heating with the defrost setting and at full power and see if either method results in any heating. The cost of replacing the magnetron at a repair shop could be high enough that you might rather just buy a new microwave oven. My father replaced the magnetron tube himself, but he's an electronic engineer. I wouldn't recommend that just anyone try it. How new/old is it?

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Let's try resetting the appliance by either unplugging it or flipping the household circuit breaker off. It is important to wait approximately ten minutes and then turn the microwave on. If resetting the power does not correct the issue, then once the tech has ruled out a number of possibilities, he or she can pinpoint the exact problem and the necessary part to fix the issue. Since parts can often be quite costly, I would personally recommend reaching out to a qualified tech who can accurately diagnose the issue your unit is experiencing.

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