Jenn Air JRSD209T
This is just anecdotal here, but one repair guy who came out and thawed a frozen line into the icemaker told us the fridge required near-full line pressure 90- or 70- or whatever that is, in order for the ice maker to work. This was a licensed repair guy. We were feeding it with an RO, which only pumped it in at 17 or 20 psi (or whatever the unit is) which he informed us was inadequate. However, after he thawed things out and we changed out the inline carbon filter in the fridge, everything was hunky dory for a couple of years. About a year back, the icemaking stopped, and changing out the carbon filters in the fridge AND in the RO system did the trick.
Now we have a different problem. Things aren't getting or staying cold, especially the fridge. I opened the housing in the back of the fridge, defrosted the extensive ice accumulated around the refridgerant coils, and everything ran great for a couple of days. Now we're back in the global warming pattern: steadily rising temperatures and thawing. I'm not feeling too happy about Jenn-Air these days.