why does my basement dehumidifier ice up

The moist warm air then condenses onto the coils and drips into a holding pan or out a drip hose. The cool dry air is then warmed by the heating coils back to the room temperature as it exits the dehumidifier. A dehumidifier works best at warmer ambient temperatures and higher relative humidity levels. PAs the basement dehumidifier condenses the warm moist air, the water vapor generally produces enough heat to prevent the cooling coils from freezing up. However when the ambient air temperature is cool, e. g. below 60o Fahrenheit, and/or the relatively humidity is below 45%, dehumidifier freeze up is possible.


The risk of a basement dehumidifier freezing up is increased if the cooling coils are covered in dirt and dust, which can frequently happen to a basement dehumidifier. By turning the basement dehumidifier off periodically you can give the cooling coils a chance to warm up and melt any ice that may have formed on them.


By raising the basement dehumidifier up off the floor, the dehumidifier can work more effectively and have a reduced risk of freezing up. Another solution, which will cost a lot more, but will reduce the amount of work on you basement dehumidifier as your basement will be drier, is to waterproof you basement. Waterproofing a basement s walls and floor can dramatically reduce the amount of moisture entering your basement, thus reducing the amount of work required from your dehumidifier.


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Refrigerant (Doesnt matter what kind) has a very specific temperature and pressure relationship. Every refrigeration system has a metering device that drops the pressure and temperature of the refrigerant. When running normal the pressure and temperature right after the metering device on an Air to Air system will be above freezing. This prevents condensate from frosting up and turning to ice.


If the system is low on refrigerant the pressure right after the metering device will drop even lower. The lower pressure will cause the refrigerant to drop below freezing and cause the condensate to freeze. Once the process starts it s a cascading effect and eventually the entire evaporator will become covered in ice. There is a fine line between freezing and not freezing. As the system continues to lose refrigerant eventually it will no longer freeze.

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