Question about Microwave Ovens
At first could not set vent fan speed...rebooted and that was fine...then, could not cook for more than 6 seconds... removed control panel, tested door switches and replaced panel...rebooted again...now the turntable motor is on and oven light on when door is shut and start button does not work. I am thinking that this is a control panel problem but would like some input before I continue to test other components. Thanks
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Posted on Jan 02, 2017
SOURCE: Microwave runs with door open
I would say you have a failing door switch or the mount which holds your door switch is loose or broken. In most designs, it is the upper door switch that will produce these very symptoms when it is intermittent or its mount is broken or loose. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure. Slamming the door, damage during shipping or transportation and sloppy manufacturing techniques or materials are the primary causes of trouble with the door switch mounts. 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
Posted on Sep 22, 2007
F9 code can mean something different depending upon the particular model.....
1.) IF your Microwave uses "UltraWave technology"/"SmartWave technology"...Then either the Magnetron has failed or the Inverter board has failed OR maybe the control board has failed (HUH?).
2.) IF your Microwave does NOT use "UltraWave technology"/"SmartWave technology" then one or more of the door switches has failed.
** "UltraWave technology"/"SmartWave technology" **
I'll explain a few things about this wonderful technology...
The control board (accepts the pushbutton commands) has to talk to the inverter board to tell it how much power should be applied to the magnetron. The inverter board will then power the magnetron and inform the control board if the magnetron is working OK.
If there is something wrong with the magnetron or inverter board or a there is a communication breakdown between the control board and the inverter board...WA-LA-----F9----
A pretty reliable test for the Magnetron is to operate the oven and listen for a ticking sound 5-6 times about a second apart. If you can hear the ticking....The magnetron has failed..if no ticking, the control or inverter board failed.
Note: This 'technology' may come in other flavors as well
Posted on Jun 11, 2008
you are right magnetron is fully interrupted....... but tell me !. do you want to repair machine( 4 sec problem) 2. do you want to buy inverter , magnetron please tell i am ready to help you sir
I believe that is a microcomputer board failure. You will have to replace this board. Website below.
I have gotten parts from "repairclinic" on line and they worked fine. I saved $600 on the last repair of an oven. Good luck.
or sir you can find and fix each and every type of code error
Posted on Oct 18, 2008
SOURCE: I have an error code
Quoting another board:
Sears Kenmore Whirlpool LG 721.63683300. F-9 on this microwave IS inverter related.
There is a service tech troubleshooting document stuffed in behind the control board cover which has some testing procedures. My problem was the magnatron and checked out bad with the help of this document. It would run for a few seconds making clicks and then say F-9. It has been working great since I replaced the magnatron PN 6324w1a002c.
f9 model 721.63764300
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.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Nov 23, 2008
You are correct the fan motor is either stuck or needs replaced.
There is no way to do this without removing the entire microwave. In case your not familiar with how microwaves work, there is a capacitor that is very large inside and can hold a charge even after it is unplugged for up to 24 hours, please take action to prevent getting shocked.
Posted on Sep 11, 2009
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