Iced up coils and will not dehumidify

Hello Friend, thank you for your question!

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

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

The gas can pass through the pipework slowly by osmosis especially after several years use. However, check fans, heat exchangers etc first before condemning unit.

Hi,
There are many reasons why a dehumidifier willnot work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrongwith their dehumidifier

Dehumidifier is running but no water is in bucket

heatman101


;'';';'

You've developed a sealed system problem.

the unit either has dirty evaporator coils and this will make them ice up,or the unit is low on refrigerant/freon,try cleaning the whole unit of dirt and dust first,then you may need to install a saddle tap on the sealed system and add some refrigerant/freon as these systems seem to leak more often than other sealed systems

check the filter make sure it is clean the unit maybe a little low on freon that will cause the icing up

could be dirt coils or low freon either way needs to be checked

First you would need to clean the filter. LG recommends cleaning the filter every 2 weeks on their dehumidifiers. The second thing you need to do is clean the coils periodically. On this dehumidifier it should include a brush for cleaning the coils. It is located on the top of the bucket. To access the coils the following needs to be done:

1.) Unplug the unit from power
2.) Remove the bucket and also the air filter
3.) Remove the front pannel by removing the 2 lower screws and depressing the tabs.
4.) Once the panel is removed you will see the coils. You need to clean them with the brush. Go in an up and down motion to remove the dirt and dust.

Now use the reverse steps to put it back together. If your dehumidifier runs often I recommend you clean the coils about every 3 to 4 months. This is a common problem on alot of dehumidifiers and people think their dehumidifier is broken. Most of the time the coils are just dirty which causes the water to stay between them and freeze. Keep me posted. Also if you found this response helpful, please rate this solution when you get a chance. Thanks - Tech101

It is now frozen because the humidistat, which controls the on/off cycle, is starting to age and forgetting to turn off the dehumidifier. Try removing the humidistat and, using compressed air, blow it out thoroughly of any dust. Then spray the rotary control area, including electrical parts, with WD-40. Then, blow dry again with the compressor and try again.