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Why does the filter in the back ice over after awhile of running

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Ice is a result of low refrigerant charge or lack of airflow across the coil

Posted on Jul 30, 2009

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My Kul Dehumidifier filter keeps freezing up? is there anything I can do to keep this from happening?


Turn the knob to a lower setting so that the unit cycles on & off. This will give it time to warm back up and melt the ice in between dehumidifying runs.

Aug 30, 2015 | KUL 50 Pint Dehumidifier"

1 Answer

Dehumidifier


when ice forms on an evaporator unit (coil) there is an indication of internal problems with the unit. IT may occur if there is insufficient air flow ( dirty or fan speed to low ) but when this happens the thermostat just orders more gas through the tx valve and so more ice is formed then the thermostat reads it as too cold and so cuts the gas flow back by controlling the operation of the tx valve
Water from a dehumidifier will depend on the atmosphere humidity so the lower the humidity reading the less water collected
However I suggest that you have a technician check it out as the compressor start/run capacitor may be faulty and that is why the compressor is not getting hot as it may not be running properly

Jul 23, 2015 | Dehumidifiers

1 Answer

When set in smart mode it runs continuously and the core ices up this results in the filter not being able to be removed. water then runs all over the floor. This also happens in normal mode Very li


Ice builds up for two basic reasons:
  1. Impeded air flow. This causes the dehumidifier to run constantly as the humistat never reaches it setpoint as there is limited or no airflow over the coils. Even with a filter, the cooling coils can become clogged and render airflow restricted or non-existent. Check and correct as necessary.
  2. A low refrigerant charge. Systems can leak over time and become low on charge. This causes extended period of running and the resultant freeze-up. If the coils and filter are clean, have the system checked for proper charge of refrigerant.

Jan 02, 2015 | Dehumidifiers

1 Answer

I have a Frigidaire Dehumidifier, Model FAD704. the Clean Filter lights keeps coming on and the unit stops running. The filter is not dirty. I take it out and put it back in and unit runs for awhile and...


Hello Winl, thank you for your inquiry!

I see that you are having issues with your clean filter light coming on in your Frigidaire dehumidifier. From what you are describing it sounds like a possible issue with a sensor within your dehumidifier. I would recommend consulting with your manufacturer to see if they can provide any additional assistance towards a resolution. Best of luck! -OOS

Dec 12, 2014 | Frigidaire Dehumidifiers

1 Answer

Moisture collecting at the top front when running, even at mid power, over the control panel, sometimes turns to ice. if I shut it off when it is doing this the problem stops for awhile


Well, sounds like you have a good cold section in the dehumidifier-- that is good!-- But I agree-- we don't want water condensing on the surface-- and we surely don't need it turning to ice!
A couple questions to help us get to the next level of trouble shooting this problem:
1.) How cold is the room you are running the dehumidifier in?
(Obviously-- the warmer a room is, the easier to remove moisture--
the colder the room, the easier to drop the air temperature well below the freezing point-- making ice.)

2.) Have the air filters been cleaned/changed recently?
A dehumidifier needs a steady fast moving supply of air across its whole condenser/evaporator surface, in order to remove the maximum amount of water from the air, and not freeze up. (I would winder if something isn't blocking the flow of air toward the top of the coil?-- so that the coil in that area is going well below freezing temperatures, and thus allowing water (or ICE!) to develop near the top of the coil?-- Can you check air flow for us?

3.) You have suggested a good solution,-- especially if the above problems can not be easily corrected: Turn off the unit every few hours, and allow the warmth of the room, to defrost the coil....
In fact-- just to make sure that the air flow is not being restricted by ice deep within the coil-- let it stay off over night-- or bring the dehumidifier into a much warmer room, to make sure no ice is still blocking air flow deep within the coil..

Let us know what you learn about air flow, and get back with us-- THen maybe we need to take the trouble shooting deeper insicde the device.

I hope this helps-- MB

Aug 22, 2013 | Comfort-Aire BHD-301 Dehumidifier

2 Answers

Esco Oasis 2700L dehumidifier ices up. Is there a filter to be cleaned and if so, how to I get to it?


Hi,

The most common cause of frost and ice buildup on a dehumidifier is because the unit is operating in temperatures that are too cold. Many dehumidifiers are not equipped to run at temperatures below 65 degrees Fahrenheit.
To fix this problem, Position the dehumidifier in an area where there is at least one foot of clearance around the unit in order to allow for proper air circulation during its operation. Close all windows, doors and other outside openings to make sure your unit isn't attempting to remove moisture from areas outside of the immediate room. Determine the temperature of the room by checking a nearby thermostat or by using a hand-held thermometer.

Check the filter for dirt and buildup. Unplug the unit from the electrical source and check the filter by opening the filter compartment. If the filter is dirty, it will restrict airflow through the unit and lead to freezing. Soleus recommends lightly vacuuming the surface of the filter to remove dirt. The filter also can be washed in warm water if it is extremely dirty. Once clean, place the filter back in its compartment. Allow for the ice to melt and then restart your dehumidifier.





Jul 03, 2011 | Dehumidifiers

1 Answer

Ice is forming on the top of the unit, it is running but not very much water is collecting


Ice will often form if the humidity level is high or the air intake filter needs cleaning. If it's because of high humidity or being used in a basement, the unit may appear to still be running, but it's usually just the fan and it's going thru a defrost cycle.

If you check the filter, be sure to turn the Master ON/OFF Switch OFF and unplug the unit. Remove the filter and clean if necessary. If you wash the filter, use warm water and dish washing liquid. Rinse thoroughly and allow to dry completely, before reinstalling it. DO NOT run the dehumidifier without the filter installed.

Hope this helped you to troubleshoot and solve the problem. Please let me know. Thanks.

Jun 20, 2011 | LG LHD45EL Dehumidifier

1 Answer

Ice on the back screen after it's been running for an hour.


Cleaning the air filter should go a long way in solving the icing problem. Just allow the unit to thaw out completely, before trying to remove the filter. Turn the Master ON/OFF Switch to OFF and unplug the unit from the wall outlet.

Apr 10, 2011 | GE ADER65LN Dehumidifier

1 Answer

Ice on dehumidifier


A dehumidifier works by cooling the metal pipes on the back of the unit to create condensation (water vapor in the air). This then drips into the collector bucket. If the unit runs too long the cooling tubes can get too cold and freeze the condesing water vapor. Unplug the dehumidifier and let the ice melt, when u turn it back on, turn it down, it may be up too high. If you find this solution helpful please rate it.

Thanks - Tech101

May 20, 2008 | LG DH404E Dehumidifier

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