Thanks for the reply. I tried to look up the LG fault code on the net, and the only alarm I could find that matched the pattern was indeed door alarm sensor.
This is for someone on another forum I visit, so I'll never look at the fridge as it's 20000km away.
I was just trying to advise him so he'd know what to look for, and know if the mechanic he calls out has any idea. The only thing that didn't make any sense to me was the flashing display, I didn't find that fault anywhere on line and on samsungs it means a heater/fan error normally.
Thanks for your reply anyway, I appreciate it. I need to learn as much as possible about all brands as I'm going out on my own soon.