LG Oven Model# LWS3081ST. I had the problem that so many others seem to have with this oven: F9 code. I read many blogs and tried several different parts and fixed the problem myself. It appears that the issue occurs when the oven gets too hot, most often after a self cleaning cycle. There are two parts which look identical 1. Thermal fuse, which costs about $3, and connects two wires under a panel on the top of the oven. 2. THERMOSTAT, which costs about $12 and also connects two wires under a panel on the back side of the oven.
In my case it was the THERMOSTAT was the problem. After taking apart my oven the THERMOSTAT was slightly deformed after being exposed to extreme heat and it broke. I purchased a new one from appliancepartspro.com
, Part Number AP5672246
. (After reading several forums I tested the PCB, Oven Sensor, Thermal fuse, and door lock mechanism and they were all fine.)
If you are handy and you want to fix yourself: turn off the circuit breaker power to oven, pull oven completely out of cabinet cavity, completely remove sheet metal panel on top and back of oven (held on by several small screws), locate THERMOSTAT which is attached to back of oven by 1 tiny screw, pull to remove the two wires attached and reattach the wires to new thermostat, re-assemble oven.