Maytag Dual Cool 25 cu. ft. Side-by-Side Refrigerator MSD2556 "blowdryer getting hot" Questions

...hot, but condenser coils on back of fridge are cool and clean of dust. Took back cover off inside freezer, top right hand corner of coils frozen and the copper tube where the Cold-Control snaps in ...

...hot cloth against the inside door (opposite and above where the dispenser is) for a couple of minutes, do this a couple more times, and after another couple of minutes the dispenser works again. Have ...