I have a walk in freezeer which is maintaining 0 degrees, but they called and said there was a 3' icicle. I get there and noticed this icicle hanging off the bottom of the suction line trap where the insulation was tore. I also noticed a lot of ice all over the boxes underneath the evap. and also half the evap had about 5 inches of ice on the back of it. It has 4 fans, all of which were working. I checked the drain line, not clogged. I checked the heat tape on the drain line inside the armaflex, it was working. Checked the defrost cycle and heaters, they work. After getting the ice off I did notice the fins on the evap side that was iced up were bent over quite a bit which would obviously affect air flow. Could this have been the only problem?