Question about LG LMVM1945 Microwave Oven
The F9 problem in this microwave is a bad magnetron or inverter.
From other users:
"F-9 on this microwave IS inverter related. My problem was the magnatron and checked out bad with the help of (the tech sheet). It would run for a few seconds making clicks and then say F-9. It has been working great since I replaced the magnatron."
"f9 Kenmore Elite 36 " over tne counter microwave is supplied by LG made by Gold Star, made in China. It's main problem is the high voltage inverter board supplyed by Sears Parts. If you get a F-9 code on your microwave display screen and the micro quits it's probably this board. Reset the machine by pulling the power plug and waiting an hour. If it is the high voltage board is at fault it will probably fail after 45 seconds of start up. This part is really hard to get at but is less than $100. A qualified technician should be able to remove and repair this item in less than hour. Some techs will quote you $300 labor, don't buy it, it should cost a $100 or less. No need to buy another microwave."
The first thing I would suggest is a hard reset. Unplug the unit for several minutes or so. Then plug it back in, set the clock and try again.
If it fails again and you or someone you know decide to look into it further, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
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.
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.
You can find exploded views and order parts by entering your model number at the Sears parts site.
The magnetron probably has an extended warranty beyond the normal one year parts and labor warranty.
So I would consult your owner's manual or contact Sears for details on the warranty.
To get your owner's manual, just enter your full model number at the Sears parts site.
On the resulting page, look to the right for the blue "View Manuals" button.
That Sears-related site has many free manuals. While the manuals they list there are all free, they will ask you to register.
If yours is not listed there for free, you would have to order it through the Sears parts site.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Oct 06, 2009
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Posted on Jan 02, 2017
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