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I see that you have frost accumulating on the coils of your Frigidaire dehumidifier, LAD704DUL. Typically frost appears on coils either because your dehumidifier has been turned on recently or the room temperature is too low. Sometimes this is normal due to refrigerant rushing through the coils and usually it disappears within 60 minutes. However, if your dehumidifier is not removing moisture, then at this point your dehumidifier may possibly been experiencing a sealed system issue. Is your appliance still in warranty? If so, you might want to reach out directly to the manufacturer to determine the coverage on your dehumidifier and the procedures to any potential remedy in that regard. Hope this helps! - Z
coils you see on the back of your dehumidifier are the evaporator. When
the unit runs, the coils get very cold. As the fan draws the room air
over the coils, the humidity in the air condenses out of the air onto
the cold coils. But, if the temperature of the air the fan draws over
the coils is too cool, the humidity that condenses out of the air
freezes on the coils. To remedy this problem, you can try any of these:Warm up the room the dehumidifier is in.Put the dehumidifier on a sturdy table (the room air is coolest near the ground).Turn the unit off until the room warms up.