Product review (5 stars): Resolved the F11 error code
Our LG LRG-3095ST range was constantly displaying an F11 error code.  This code meant our oven would not start.  An interim trick I learned was to first start one of the stove top burners before beginning to preheat the oven.  The oven would then typically work if I had a burner going first.

Initially I replaced the main control board in an attempt to remediate the F11 error code.  That did not resolve the issue.  I then replaced the igniter and the thermostat.  Once I installed the igniter all was well and the F11 code was resolved.