SOURCE: kenmore elite utra microwave 721.63763300
Your model number prefix of 721 means it's made by LG / Goldstar.
F9 code on an LG means either a bad door switch or a loose door switch mount.
Even though a door switch clicks, it may still be bad inside.
This can be caused by slamming the door or by habitually opening the door while it's cooking without hitting the Stop pad first.
If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is 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 here: http://www3.sears.com (the 3 is correct)
We're happy to help and we appreciate your thoughtful rating of our answer.
SOURCE: Kenmore ultra elite microwave hood combination
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
SOURCE: MVP IV Microwave Model VM12AM-1
There are a series of switches in the door latch mechanism which are a safety interlock system. If the latch on the door is secure and not broken then it is in the latch mechanism itself. It is possible for the mechanism to come loose and stop the oven from working. The control panel will have to be removed and the mechanism adjusted for proper operation.
Alternately if the door hinges (screw in type) are not aligned properly then it can cause the same symptoms.
I am unable to locate your model in my reference, but there is usually one or two screws behind the grille that hold the control panel on if it is a vent hood style. If it is a cabinet style then the cabinet will have to be opened. Be sure to disconnect power at lease 1/2 hour before opening.
SOURCE: the micro wave suddenly stop working, it was not in use.
I would suspect the internal fuse or the thermal cutout or thermostat on the magnetron.
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. In some models, it may only be a wiring diagram.
If you or someone you
know
decide to look into it, we have critical safety information and
disassembly information at our site, and our link is at our listing here on FixYa.
You can order Magic Chef / E-wave / Daewoo parts here.
Feel free to contact me directly (and please remind me of your
full model number) for more information & help.
We're
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
William E. Miller
[email protected]
http://www.microwavedisplay.com
SOURCE: Microwave oven stopped working
OMG!!! This was perfect. I had the same problem. Timer was on but the fan nor the table turned. Just when I was about to take the thing and chuck it in the trash, I thought I'd give the above method a try. I turned the microwave on, and nudged the door sligthly upwards.... miracle! it started to work. to make it permanent, I took the door off (the cap on the inside of the door, on the upper hinge needed to be removed with a flat head screwdriver, very easy, just pry it off). Once I took the door off, I placed a small washer on the bottom hinge to raise the door slightly. Put the door and hinge cap back on... and Voila! The microwave works now. Thanks for the help guys...
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Hi Jenny Greg Johnson, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?
Model, any messages or error codes, beeps?
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