For the 2nd time in a few months the fridge got warm. Checked the damper and was working. Freezer element in the back had frost. I unplugged the fridge and defrost for 12 hours. The instruction video was clear and was easy to open the back freezer panel. Replaced the defrost thermostat and used heat shrink butt connectors instead of provided ones that kept coming off. Gave the freezer door gasket a good cleaning too. The repair took 1/2 hour. The fridge has been working like new since.