Question about DeLonghi DE400P Dehumidifier

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Delonghi de400p The bucket is bone dry and no water is being pumped through the drain hose. this unit is almost 1 year old. I have the humidity set for 45% the fan works and im not getting any error codes. why did the unit stop working all of a sudden???

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  • ajays56 May 12, 2009

    The unit is 13 months old and is not driving any water (neither the bucket nor the pump).... the fan is running continuously...

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Same thing happend to me. I wasnt sure if it was the settings or me. I unplugged it for awhile, read thru the instructions turned it back on setting it according to the instructions and it began to work again. Not sure if it had to do with the unit being off for awhile or I entered the correct settings. Im just happy it began to run again

Posted on Sep 04, 2008

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Posted on Jan 02, 2017

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Why would the system keep running, all the time, filling up bucket, then leaking onto floor? What is my next step?


There is supposed to be an auto-shutoff float in the bucket to prevent overfilling of the bucket. You have either removed it or it is defective. The fact that it runs constantly has more to do with the humidity and the setting that you have the unit set to, Obviously there is adequate humidity in the space or the bucket would not fill. You need to look for, find, and repair the shut-off float, or, if possible, some units allow you to connect a drain hose either to the bucket or directly to the unit to drain the water to a drain. If you choose this option, remember that the hose must remain lower than the top of the bucket or it will not drain properly and the bucket will still overflow.

Jan 23, 2016 | Dehumidifiers

2 Answers

When i take out the collection bucket there is a clear hose on the left side that goes up that is disconnected and leaks water on the floor not into the collection bucket


If you look at the gray plastic part at the top, there's this gray nub thing. Slide the tube onto that and your problem is solved.

Sep 20, 2011 | DeLonghi DE400P Dehumidifier

1 Answer

Our 580701 70 Pint Low Temp Dehumidifier is just under 5 years old. It is set up with the drain hose connector and has been set this way for several years. We have the humidity level is set at 35%. ...


You seem to have done most of all the right things, so that means the problem may be the basement. Along with a couple of other things. All are totally solvable.

1. Obstructed air flow. Maintain a minimum of 12 to 18" of clear air
space around the entire unit.

2. Cooling coils are dirty and need to be cleaned. Use warm water & dish washing liquid to
clean the coils. Rinse and wipe dry. Apply a light coating of WD40 to the coils.

3. The hose is partially clogged or the hose connection on the unit and it interior tubing may be
partially clogged. Turn the unit OFF and unplug it.
Using an appropriately sized, 18" long, plastic Zip Tie, carefully insert the tip of Zip Tie into the hose connection and tubing. Continue to push it in until you reach a bend in the tubing. You will need to gingerly work the Zip Tie past this bend, until it either bottoms out or you run out of usable Zip Tie. Then slowly pull the Zip Tie back out while rotating (twisting) it. This will breakup any clogs. As you reach the inserted end of the Zip Tie, be prepared, as some water may follow. Reconnect the hose, plug the unit in and turn the Master ON/OFF Switch to ON. Set the humidity extraction level to 35% or Maximum if you have a manually controlled unit. Allow the unit to run, while you monitor it for any leakage.

NOTE: If you don't have a Zip Tie, you may use something similar ( i.e.a long pipe cleaner), but NO wire coat hangers


If none of the above solves the problem, it may be a case of the compressor needs to be recharged with refrigerant gas or that the humidity condenser sensor is failing. These things usually occur in units that are 5 years old or older. It's rare in a unit younger than that. But, it can happen.


I hope this helped you troubleshoot and solve the problem. Thanks for choosing FixYa.

Aug 09, 2011 | Kenmore 54701 Dehumidifier

1 Answer

My dehumidifier does not seem to be working properly. I can't find the manual to tell me what the settings should be. Would appreciate your help. It is a DeLonghi DE400P. Thanks Shirley


What is the specific problem? Is no water being collected by the dehumidifier or do you have another issue?

Make sure that the dehumidifier is in a room in the operating temperature range (at or above 44 degrees F). Make sure that the room door and windows are closed and that the room is not larger than 2200 square feet. Make sure that the collection bucket not full and is properly seated in the dehumidifier. Check and clean the air filter on the dehumidifier. (Vacuum the filter or rinse under running water three times. Then wait until dry to replace it in the dehumidifier.) Look at the coils of the dehumidifier. If you have ice on the coils, defrost the unit (turn off, unplug and wait for it to melt). If the ice reforms quickly, you may have a leak in the coolant system. Then the unit needs repair.

Next make sure that you have good air flow around the dehumidifier and that the desired humidity set point is lower than the humidity of the room.


Retrevo has the manual available: http://www.retrevo.com/support/Delonghi-DE400P-Heating-Cooling-and-Air-manual/id/19269bh037/t/2/ . You will need to enter a code to download the PDF.

I hope this helps.

Cindy Wells

Aug 09, 2011 | DeLonghi Dehumidifiers

1 Answer

The dehumidifier will not run. It has power to the control panel but the "bucket full" light is flashing RED. We have a hose hooked up to the unit to drain the water and we have check the bucket...


Generally, the buckets on these units can be a little finicky. Especially, if the bucket is not installed properly. In other words, if the bucket doesn't trip the safety switch, when it's out in place and the "bucket full" indicator will remain on and the unit will not run. I suspect the hose attached to the bucket may have gotten the bucket slightly out of place and it's not triggering the safety switch. Turn the unit off, and reinstall the bucket,. Then turn the unit back ON. Make sure there is a little slack in the hose from the unit to the where ever you're draining the water to. In other words, the hose should not be pulling on the bucket.

As I said, they can be a little finicky, so be patient reinstalling the bucket. As it may take several tries, before you get it right.

Hope this helps solve the problem.

Mar 10, 2011 | LG Dehumidifiers

1 Answer

Just received tne unit with pump. There is a hose in the collection tray area that is connected at one end to the unit but not the other. After 1 hour of running, water was coming from that hose and not...


If you look above the tubing, there's a little gray nub/cone thing. Slide the tube onto that and it should fix the problem. If you're trying to use the pump instead of the collection bucket, there are good directions in the manual.

Aug 13, 2010 | DeLonghi DE400P Dehumidifier

1 Answer

Water not going into hose or bucket


where are u located and where aqre u using the unit
a dehumid wont work properly below 60 degrees
or 40 percent humidity

Oct 17, 2009 | Goldstar DH304 Dehumidifier

1 Answer

Does not collect water (also 2 years old).


the evaporater coils rot out and the freon leaks out. thats about all the longer these newer ones last now.

Jul 09, 2009 | LG LHD45EL Dehumidifier

1 Answer

Moisture not collected


low on freon is the compressor running?

Jun 18, 2009 | DeLonghi DE400P Dehumidifier

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