DeLonghi DE400 Dehumidifier Logo
Posted on May 13, 2011
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It looks and sounds like it works good but it is not pulling any moisture out of the air. It will run for days and there will only be a little bit of water in the bucket?

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  • Master 2,468 Answers
  • Posted on May 13, 2011
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The refrigerant r134a has leaked out,you need to have it recharged,this is normal for most de-humidifiers after 2 to3 years of use

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Flooded floor

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The dehumidifier is running constantly but no water is being collected

Sounds like you're in a wintery environment. Most people operate a humidifier in those locations because the air is too dry. If that is your situation, I suggest you turn the dehumidifier off until Summer and save electricity. If will pull moisture out of the air in the summer.
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My Haier dehumidifier is harly removing any moisture from the air. It appears to run normally and I have cleaned the filter regularly. I've owned it about a year and it is model HD456E. It worked very...

If the evaporator coils behind the filters become too dirty condensation can be seriously ********. Check to see if the fins require any attention; they can be cleaned very carefully with a toothbrush and some water usually. If the buildup has become severe special chemicals need to be used on the unit- not something recommended the average person attempt. If the fins are clear check other airflow issues. Dehumidifiers generally need a period of 3 days to balance an area properly when functioning and sized appropriately.
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Dehumidifier is running the filter is clean but its not pulling moisture out of the air. Nothing is coming from the hose that is attached

What is the setting? Your machine is controlled by a 'humi-stat'. It comes on when the machine detects the % moisture in the air is more than that number you selected on the machine ... usually a number between 45 and 100 %. If your machine turned itself on, there must be some humidity in the air (50% is the ideal, BTW). The machine works based on natural laws that cannot be violated. Think Dew Point - think hot air going over cold surface. Think a glass of ice water sitting in the sun on a hot humid day. Think cold can of soda on a hot day. ... and so forth.

The filter would have little effect on the actual operation. The filter is to keep the dirt off the cold, normally wet coils. Were it not for the filter, the coils would become clogged with dirt and there would be no air movement over them to remove the water. Still, the filter doesn't actually have a big impact on the mechanical operation of the device - You have done well, keep it clean and in place.

So, you know there is humidity in the air that exceeds the setting on your machine, right? If there is water in the air and the machine is operating normally, there will be water on the coil that drip into the bucket and into the hose, into the drain ... ultimately back to the sea, full circle.

If it is not wet, perhaps you have set the humistat to a number where there is little water to remove - it may be removing that tiny bit of water and because it is so dry in your space, the water may be going right back into the air. Air does want a certain amount of water in it. Too little and you will not be comfortable, furniture will dry out - crack. Your nose will dry out - you will be very uncomfortable - static electricity will be prevelant - you will get shocked as you move about the space. Think about cold dry winters when people actually put water back into the air for their comfort with a HUMIDIFIER. During such conditions, the water (in the tank of the device) just disappears into the air.

So what to do. I suggest you review the setting on your machine. Set it to 50%. Get a device to measure the humidity such as one found on this page: http://www.calright.com/products/gr_id/64/?gclid=COGVyqD14KoCFcl95QodTEOj6g. Of course, it would be nice if you purchased the device from a FixYa.com advertiser - look around this answer for their advertisement.

I would run a fan in the space to circulate the air so the dehumidifier has the best opportunity to measure all the air, and treat it. If the machine continues to not produce any results (water) you may have a faulty humi-stat or your device may have a leak - thus low or no freon or other agent inside - to make cool coils for the warmer, humidity laden air to flow over thus causing the humidity to give up its hold and condense on the coils, fall to the bucket, etc.

I hope this discussion helps you with your trouble. Thank you for your interest in FixYa.com
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Had moisture on top for a few days. Then just quit running. Turned it off, let it for a day, turned it back on, it ran for a little bit and quit again and now will not run at all.

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
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Bucket not filling, unit seems to be making more noise

Hi,

If you are running and not pulling moisture first check air flow. Vacuum the front and back grills and make sure the coils are clean. If you have good air flow the cause of the problem is most like a sealed system issue. This is most commonly a refrigerant (freon) leak. check your use and care manual to find how long the warranty on the system is, sometimes it is as long as 5 years. If it is out of warranty then the repairs are more costly than a new unit.
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You need to determine what's "running". Here's why: There are three things that must be working to extract water. The 'coil' (a finned metal part that needs air to flow across its surface) may be filled with dust and obstructions, so no air can move...then no water. There is a blower motor that must move the air. If it is seized up and not blowing air...very little or no water. The compressor creates condensation from air moving across the coil (like the moisture than forms on an ice filled glass on a humid day) to extract the water from the air. If it's not working then no water.
So, if there is air blowing out of the dehumidifier the blower is working. If the air is room temp the compressor is not working. If it's real hot air, and the humidifier keeps cycling on and off quickly, the coil is dirty. Those are the 3 things that need to be working.
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Dehumidifier does not pull moisture from the air

Hi,
There are many reasons for a dehumidifier2_bing.gif to not work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier2_bing.gif.

Dehumidifier is running but no water is in bucket
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101
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I did a little digging around on the internet and found out that if the basement (or where ever you have your unit) is in an area where the room temp might dip below 65 degrees the coils may start to become "too efficient" in pulling the moisture/humidity out of the air and it begins to freeze on the coils before it can drip off into the reservoir. The site said to turn off the unit and let it thaw out, then restart it and see if everything works ok after that. If the temperature gets too low you might need to warm up the air in the room/basement before it will operate correctly again/not continue to freeze up. Hope this helps. Mine just did the same thing but we've had some pretty cold weather recently and the basement is fairly cold as well.
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