If this is a common problem then I am going to start informing the builders I work with that I have another plan. My wife this morning has green lighted operation Fridge drain line!
JW
Kitchenaid fridges are just another product of Whirlpool, and if you look (even not too closely), you will see many similarities in the way they are built, layed aout, etc. If the drain line from the evaporator clogs up, and it is not from ice, it is most likely from dust mixed with the condensate that is supposed to run down into the pan at the bottom. I would think that if you did a poor job of cleaning out the refrigerant liquid lne cooling coils, the fridge/freezer would not do its best job at cooling or freezing food efficiently.
My current fridge, a rebadged LG side by side Sears Kenmore Elite, has not had this problem yet after 2 years, and I ashamed to admit I only vacuumed the coils under the fridge once so far, but it was not so bad.
I had a new Kemmore elite just prior to that for one year that was a rebadged Whirlpool that Sears service could not fix because the problem was the program in its controller's firmware. Sears would change all the parts involved, but the problem remaned the same because Whirpool never re-wrote the little routine that would grind up some ice that would sit on the dump trap door and melt EVERY 23 hours and 55 minutes, exactly. That would melt, and grow mold in the area of the trap door. I uploaded a video to Sears, and they offered me a replacement fridge to choose from within a 100 to 200 more bucks over the cost of my original purchase. I paid over $2,200 for the first fridge. The "LG" one was $2,300.
I wonder how the thousands of other purchasers of the same first fridge made out with their's. The only reason I saw the mold is because I looked up into the ice dispenser chute to see what was going on when it made a grinding noise every day at "almost" the same time.
Its sad when you get a service tech to your house and you feel like (and actually DO) know more than they do.
At least Sears does have good customer service people on the phone and an excellent online customer advocate group.