I came back from vacation to a fridge that wouldn’t get cold and a freezer that was iced over in the back. I have a bottom-freeze model so I knew the issue – ice was clogging the duct that allows cold air up to the fridge. I’m guessing the defrost cycle didn’t kick in enough to defrost the back so I used some hot air to try and clear the path. That worked but there’s no easy way to trigger a manual defrost from the manual. Until I found this video which worked!
After a couple of cycles everything seems to be working better. I still have a Raspberry Pi monitoring the temperatures so I can keep an eye on it before I do some actual fixing. But so far, so good. See this post for that project: https://chriseaston.com/2023/01/30/fridge-and-freezer-temperature-monitoring/
A little warm after the defrost cycle but more in line…