I'm considering purchasing a new IC40, and I'm wondering if Pentair has resolved the problems with their older models. I see that Pentair now has a 3.1 firmware in their latest models. My last unit was a 1.9R. I'm wondering if the 2.x and 3.x models are considered to be more reliable than the 1.9 and earlier. I see a lot of posts with IC40 problems that are very similar to what I went through, but I don't see anything that discusses the differences between the different versions.
For reference, here is a history of the problems I've had (details in threads below):
My first cell lasted about 18 months (two season). It was replaced under warranty, but the replacement only lasted about 18 months as well (one season). I gave up and switched to liquid chlorine and tabs, which has worked just fine. I used liquid only for about 9 months, and have been using mostly tablets for the last 14 months. I have not had any problems with the pool during this time.
My CYA is now in the 80-100 range, so I know that I need to do a partial drain and fill to bring it back down, but this wouldn't be necessary if I put in a new cell.