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Old 08-28-14, 08:05 AM   #177
ctgottapee
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The drain pan freezing is independent of where or how you mount it.

In continuous cold weather, the defrost mode dumps water that then quickly freezes inside the unit. The pan has small holes but must keep the unit enclosed for suction ability of the fan. Once the drain holes freeze over, it really starts building up, like several inches of ice. It doesn't seem to hurt much as the ice will melt around the coils in defrost mode, but it can build up and fill the cabinet and hit the fan blades eventually.
There will be ice on the ground the melts it way through but that doesn't effect the units performance.
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