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F-9 error on LG microwave

When I turn on the microwave there is a steady ticking sound and a few seconds later it stops and shows F-9 error message.

Posted by sgarcz on

  • 10 more comments 
  • Anonymous Dec 26, 2007

    We have the same problem with LG LMVM1945. The clock runs for 6 sec with a steady clicking sound and the F-9 code is displayed. We have unplugged power to the microwave for 15 min with no effect.

  • Anonymous Jan 30, 2008

    I had the same problem. The microwave would run for 10 seconds, then stop and display an F-9 code. It was a bad magnetron. The magnetron is covered by a 10 year parts warranty. I had to take the microwave to the repair shop and pay $85 for labor. It would have been $215 for the tech to come to the house to fix it. The microwave is only 22 months old. No help from LG.

  • nomolgfme Feb 13, 2008

    6 seconds the oven turns on and stops and display f-9 called lg services lady play dum and said to turn off oven and restart to no avail?They must know about this problem by now!!! No more lg for me forever!!!!!!!!

  • keithwil Feb 21, 2008

    Same problem here too. The microwave runs for about 10 seconds, stops, error code F-9 displays. Does anyone know for sure what this error means?

  • tcmurph Jun 22, 2008

    I turn on microwave, it shuts down after 6 sec. with error code F-9. LG was no help. What is more cost effective,repairing or junking it and buying a new one.?

  • magnagroup Sep 12, 2008

    Runs a few seconds. Shuts down. F-9. Not surprised. It's been problems since day one. Not getting fixed again and NEVER buying LG.

  • Anonymous Oct 26, 2008

    F-9 code appears after a few seconds, unit about 18 months old. Called LG they told me to unplug the unit and wait 15 minutes. No improvement.

  • easllc Apr 09, 2009

    F-9 appears 10-30 seconds after responding to selecting cooking instructions. It will cook using 30 seconds intervals repeatedly-very time consuming!

    When it first started I thought I smelled something burning - not food!

  • Anonymous Apr 11, 2009

    Microwave runs for 5-10 seconds, then I start hearing a clicking sound at a 1 second interval - after about 3 clicks, the microwave shuts off and displays F-9,

  • Anonymous Apr 23, 2009

    The notorious F-9 error about 6 seconds into the cycle.



  • amebud May 03, 2009

    I have the exact same issue with an F-9 error message that has been described. Unit is about 2 years old. Haven't been able to find a response online as to what an F-9 error is. Still looking...

  • btkaplan529 May 13, 2009

    Microwave runs for 10 seconds then stops, showing F-9 on screen.

    Does anyone know how to fix this without calling a repair service?

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1 Answer

William Miller

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  • LG Master
  • 9,179 Answers

This is a problem with the inverter or magnetron. Due to the lethal voltages involved, I do not recommend that a person without training and experience ever work on these models. You can find support for service or parts at http://us.lge.com/support/support.jsp

Posted on Sep 22, 2007

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