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Household Handyman
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Not sure what you are asking. IF you mean that the coils within the unit, probably in the back area have frozen over with some icing: Then the unit is probably low on freon. Freon you ask? Yes, a dehumidifier is nothing but a small air conditioner which pulls/pushes room ambient air across the cold coils causing the dew point of the ambient air to drop and the water condense on the coils. This water will drain off the coil tubing and into the waste water bucket to be emptied. Can you service these units--Sorry No. These little units are sealed up tight vs. a home air conditioning unit. Freon cannot be added by a homeowner/DIY person unless they have special tools and knowledge of how to do these. They only carry like 2 or 2.4 ounces of freon also. Very hard to put this tiny amount in a system.
 
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