Daniel G Sunman , IN March 22, 2016 Appliance: Model LGG3043KFSF When we tried to use the oven we got f31 code The temp sensor tested ok, so that left the control board. I ordered one at about 3 pm on thur and received it at 930 am the next morning. I took about 15 min to install, problem solved. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes