More than likely, your 5 yr old dehumidier may not be a "low temp" operation model. Even if it was designed for low temp operation, many manufacturers' units can still only operate correctly (not freeze up) if the temp is above 40-50 degree range. I've only seen one or two units so far that advertise that they can operate down in the higher 30's.
Dave Lindler
January 2007
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