Don Vandervort, Head Homeboy, has written more than 30 DIY home improvement books, been a segment host on HGTV, served as MSN.com's home improvement expert and written countless magazine articles.
A dehumidifier will often frost up if room temperatures are colder than about 65 degrees Fahrenheit. If your room temperature isn’t this cold, airflow to the unit may be restricted or blocked entirely. To troubleshoot this:
1) Be sure the unit is set far enough from the wall so that airflow isn’t restricted, but also not in a drafty spot.2) Clean the evaporator coils. To do this, unplug the dehumidifier and take off the outer cover. Allow excess moisture to evaporate from the coils. Then, using a brush attachment on a vacuum cleaner, remove all dust buildup. If necessary, cover the motor and electrical parts with plastic sheeting and spray with water.
