Thanks for all of your replies. It seems the problem was that I had set the temp settings too high. We travel between metro St Louis and southern AL, both high humidity environments. Last summer we had an issue with maintaining cooling and increased the settings. I also added a fan to increase air flow over the coils. Unfortunately, I failed to reduce the refrigerator settings after the outside temperature cooled down, thus the icing in the refrigerator compartment. I’ve not had any icing in several days and the inside temperature is still at an acceptable level. Again, thanks very much for your replies.