I have a LG stove with double gas ovens. The bottom oven stopped being able to heat up. After a few minutes, the stove returns a F19 error code.
I replaced the igniter (Part# MEE61841401 on the bottom oven and it was working again.
I unplugged the oven from the outlet and turned off the gas.
I removed the bottom oven door but you can probably do it with removing it.
I had to unplug the igniter from the back of the oven and then remove the following:
1. Bottom oven cover - 2 screws at the front
2. Flame guide - 2 screws at the front
3. Nozzle case - 1 screw. The nozzle case covers the junction point where the burner assembly connects to the gas supply.
4. Burner Assembly - 2 screws. The burner assembly is the actual gas burner that heats the oven up.
The igniter is connected to the burner assembly. Disconnect it from burner assembly (2 screws) and replace with the new working igniter.
Reverse the instructions above and repair should be complete.
Remember to plug oven back into the electrical outlet and turn gas back on.