Product review (5 stars): I did it!!!
I did it!

My story was the same as others. F11 error, oven not heating up. Oven taking 2 HOURS to reach 350. No repair people want to touch LG ovens. Googled a bit.
Found the stories about the ignitor.
I ordered it figuring Id try replacing the ignitor, and if it didn't work, get a new oven. YouTube had some how to videos that were straight forward. 30 minutes later and my oven works like new again. 350 in fifteen minutes. For whats it worth, my handyman knowledge is average. If you can work a screwdriver and ratchet, you can fix this.