I replaced the thermal sensor. I followed your video and others to remove the necessary parts. This involved removing the top from of the dryer and then removing the drum. Before you remove the drum look underneath it with a flashlight to understand how the belt feeds around the pulley. I took a couple pictures as well. Once you remove the drum you can better see how the belt works. This will help when you reinstall the belt on the pulley as you have to do it after the drum is in place again. Our LG washer and dryer are 16 years old and there was a good bit of lint in the bottom of the dryer and some in the heating element. I cleaned out all the lint and also took the top half of the heating element off to clean inside of it. I also removed the drum rollers as lint and hair were trapped along them. You just have to remove the triangular rubber stopper to slide the roller off. I also ordered a belt for the drum as it was fraying. I also tested the old thermal sensor and it had no continuity. The new one had continuity and this confirmed the failed part. After easily replacing the sensor, reinstalling the dryer parts took half the time.