Dehumidifier does not reduce humidity.

SOURCE: Ice on dehumidifier coils

most likley low on freeon gets colder when it leaks out stat could be not working correctly

SOURCE: Dehumidifier switching on and off, a lot

Check this page:

http://forum.doityourself.com/archive/index.php/t-308629.html

SOURCE: Dehumidifier doesn't draw in water (humidity).

It may be too cool in the basement for it to work. Mine doesn't work if its 67 or below. Take it upstairs and see if it works there, where it is warmer.

SOURCE: Ice forming on the coils of my Crosley Conservator dehumidifier

Hi,
Dehumidifiers freezing up can be causes by a few different problems.
Here is a tip that I wrote to help people with the freezing dehumidifier problem....

Dehumidifier is Freezing up and not working
http://www.fixya.com/support/r4662033-dehumidifier_freezing_up_not_working

heatman101

SOURCE: I have a 2 year

Don, unless your dehumidifier is a Low temperature model, that very well may be the problem.
The air temp in a basement at floor level is colder than that chest level. Dehumidifiers don't work well at temperatures at 40 degrees F or less. Raising the unit up off the floor on to a sturdy table, counter top, etc, that is strong enough to handle it's weight, plus a full tank of water, will generally solve the problem. The higher up you can safely put it, the better. Also, lower the humidity extraction level to 35%. As 50% is just not low enough in a basement application.

Hope this helps you to solve the problem.