Surfed the net on the problem and found the repair solution on Appliancepartpros website. This apparently is a common problem on this model. The drain would freeze up and would not allow the water / moisture to be removed from the cooling coils during the defrost cycles. The site showed a simple fix of a clip that connects / clips to the defrost heater line at the bottom of thee coil and fits into the drain. The intent is that the clip is a heat conductor and will assist in preventing the drain hole from icing up at the drain hole. I just installed the clip which took all of 1 minute once I removed the coil cover and block of ice from the coils. Removing the cover so as not to damage the styrofoam insulation vent pad was 95% of the labor. The order was accurate and they delivered the part within 2 days even though I used regular shipping. Very good service!