Question about Kenmore Dryers
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.
Posted on Jan 20, 2008
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
F-44 indicates a faulty blower motor controller. $169.00 from sears
or about $115.00 from an appliance parts store. Also note: the
service technicians repair guide is usually folded and tucked inside the top of the dryer console. It contains all the F codes and disassemble and reassemble and testing instructions. Part # for the service guide is (W10035270).
Posted on May 15, 2009
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