Question about DeLonghi DE500 Dehumidifier

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DeLonghi DH400P pump

Pump that sends water to an external hose does not pump water out.

Posted by Anonymous on

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 159 Answers

SOURCE: Dehumidier Delonghi DH400P not removing any water from the air

Only thing I can tell you to do is to make sure that the evaporator in the back is ice and cold. If the evaporator is not cold the unit will never remove moisture from the air. And if that is the case you have a sealed system problem. The unit may have a leak so there is no gas in it. The compressor may not be working or the humidstat my not be working properly. So check those thigs out or if its under warrenty call for service.

Posted on Jul 12, 2007

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SOURCE: Hi I have a delonghi

Check to see if the filter before the pump is plugged or restricted.I washed mine out with a bleach/water solution.

Posted on Jul 21, 2008

  • 1 Answer

SOURCE: DH400P

I had a similar problem with the pump not working and the water flowing into the main drainage bucket instead. I had to disassemble the housing...not an easy project to reassemble...and found that the pump has its own smaller drainage tank with a float device, a pump pre-filter, the actual pump, then of course, more drainage tubes. The entire pump drainage system of components needed cleaned of accumulated, mucoid, slime! I cleaned the channel in which water flows into the pump's tank...located on the screen filter side of the dehumidifier. Then I moved to the other side of the dehumidifier and cleaned-out the entire pump drainage tank. Note that the pump's drainage tank only empties about 1/2 inch of water each time the pump activates. Thus, there is always alot of water in the pump's drainage tank. Thus, alot of time for slime to accumulate. Next, I cleaned off the float mechanism. I then cleaned-out the pump's pre-filter. Cleaning out the pump's pre-filter was paramount to the pump functioning properly and quietly! I checked that my pump was properly installed and NOT rubbing against its mounting so that it operated quietly. I added fresh water to the pump's tank several times to insure that the pump was working properly and that all slime was eliminated. Finally, I reassembled the housing...not an easy task! My pump now functions like new. All this work had to be done to insure proper function of the dehumidifier's pump system. My dehumidifier is only 11 months old. It is still covered by the one year warranty, but it is too expensive to ship the entire unit, as Delonghi requires you to do at your expense for them to fix it under warranty. You can be assured that I will check for future slime build-up to keep my dehumidifier functioning properly. The dehumidifier works great, it's just that it's high maintenance.

Posted on Jul 21, 2008

  • 3 Answers

SOURCE: Delonghi DH400P Discharge Hose

I have the same problem on ocassion.
I just remove and reseat again , making sure the front of the tank is flush with the unit. sometimes a little more push in does the trick

Posted on Sep 04, 2008

  • 1 Answer

SOURCE: DeLonghi dehumidifier hose by drain tray leaking

I think that I am having the same problem, but I'm not sure that this tube needs to be plugging into anything. However, my humidifier seems to be draining out of this tube rather than from the tray into the bucket.

Posted on Jul 18, 2010

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1 Answer

Pump light is blinking


ck your water pump and hoses , the light is telling you it has sensed a problem

Sep 12, 2015 | DeLonghi DH40P Dehumidifier

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What is the part/how to find replacement discharge tube for DH400P? I lost the original hose because, initially, I was able to just drain into floor drain. Now, new location, I need to use the pump feature...


Try explaining what you need to an appliance parts supplier or find a current model DeLonghi dehumidifier and identify to a salesperson what you need.

Jun 12, 2014 | Dehumidifiers

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What diameter tubing is used with the Delonghi DE 500P pump


George, regular garden hose is what is generally used for continual drainage. Just don't exceed the maximum length of hose, that is listed in your Owners Manual.And, despite what they say about being able to pump water up thru abasement window, it really doesn't work that well. Unless the unit is right below the window,

Hope this helps you and thanks for choosing FixYa.

Sep 04, 2011 | DeLonghi DE500P Dehumidifier

1 Answer

Condensate pump buzzes but does not remove water. have blown out discharge hose and clean check valve with changing symptons. Should I give up and put it on a box and buy a separate condensate pump or...


Edwin, according to the Owner's Manual, when this happens the drain hose is not connected properly. Turn the unit OFF and unplug it, then disconnect the hose and reconnect it. Plug the unit back in, Turn the Master ON/OFF Switch to ON and press the pump button. If the hose is connected properly, the pump should tunr on and pump the water out.

To help you further, I have included a link to the Owner's Manual for a Delonghi model like yours. Once you go to that page, click on the Acrobat Reader Icon and download the Owner's Manual. You may print it is you like.

http://www.delonghi.com/us_en/products/dd50p/

Hope this helped you. Please let me know. Thanks.

Jun 23, 2011 | DeLonghi DE500P Dehumidifier

1 Answer

I am trying to get information on the maximum lift of the water pump. How high above the unit can it pump the water?


Unfortunately, there is no pump on that dehumidifier. If you're using a hose for continual drainage, it shouldn't be more than 5' long. As it relies entirely on gravity to drain. As a matter of fact, to the best of my knowledge, there is no residential portable dehumidifier on the market that has a pump. They all rely on gravity.

Hope this helped you. Please let me know.

May 16, 2011 | DeLonghi DE500P Dehumidifier

1 Answer

I want to change my deLonghi Dehumidifier from emptying into the container to continuous flow into the sink. I was given this from a friend, not new and dont have a manuel or the hose to change it over....


You may have a older model that has a collector tank with a protruding tube on it. If so just cut the end off the tube and slide on a piece of clear 9.5mm internal diameter PVC / Rubber tubing suitable for a fish tank air / water pump and secure it with a nylon tie wrap.

Continuous external draining for newer models with clear collection tanks.
If the appliance is to be operated for long periods of time but you are unable to empty the tank, you are recommended to use the continuous drain facility.
• Drill the inside of the drain spout using a small drill bit. This is located behind the rear grlle in the lower centre of the opening.
• Fasten the rubber hose to the spout. For models without drain hoses supplied, we suggest you purchase a rubber hose around 2m long, with an internal diameter of 9.5 mm.
• Make sure that the hose is not higher than the spout, otherwise water will remain in the tank; also check that the hose is not twisted. N.B: Keep the rubber bung. You will need it to plug the hose or close the spout if you revert to draining into the tank

Sep 28, 2009 | DeLonghi Dehumidifiers

1 Answer

Delonghi DH400P Discharge Hose


I have the same problem on ocassion.
I just remove and reseat again , making sure the front of the tank is flush with the unit. sometimes a little more push in does the trick

Aug 11, 2008 | DeLonghi DE400P Dehumidifier

1 Answer

DH400P


I had a similar problem with the pump not working and the water flowing into the main drainage bucket instead. I had to disassemble the housing...not an easy project to reassemble...and found that the pump has its own smaller drainage tank with a float device, a pump pre-filter, the actual pump, then of course, more drainage tubes. The entire pump drainage system of components needed cleaned of accumulated, mucoid, slime! I cleaned the channel in which water flows into the pump's tank...located on the screen filter side of the dehumidifier. Then I moved to the other side of the dehumidifier and cleaned-out the entire pump drainage tank. Note that the pump's drainage tank only empties about 1/2 inch of water each time the pump activates. Thus, there is always alot of water in the pump's drainage tank. Thus, alot of time for slime to accumulate. Next, I cleaned off the float mechanism. I then cleaned-out the pump's pre-filter. Cleaning out the pump's pre-filter was paramount to the pump functioning properly and quietly! I checked that my pump was properly installed and NOT rubbing against its mounting so that it operated quietly. I added fresh water to the pump's tank several times to insure that the pump was working properly and that all slime was eliminated. Finally, I reassembled the housing...not an easy task! My pump now functions like new. All this work had to be done to insure proper function of the dehumidifier's pump system. My dehumidifier is only 11 months old. It is still covered by the one year warranty, but it is too expensive to ship the entire unit, as Delonghi requires you to do at your expense for them to fix it under warranty. You can be assured that I will check for future slime build-up to keep my dehumidifier functioning properly. The dehumidifier works great, it's just that it's high maintenance.

Jun 15, 2008 | DeLonghi DE400P Dehumidifier

1 Answer

Dehumidier Delonghi DH400P not removing any water from the air


Only thing I can tell you to do is to make sure that the evaporator in the back is ice and cold. If the evaporator is not cold the unit will never remove moisture from the air. And if that is the case you have a sealed system problem. The unit may have a leak so there is no gas in it. The compressor may not be working or the humidstat my not be working properly. So check those thigs out or if its under warrenty call for service.

Jul 11, 2007 | DeLonghi DE400P Dehumidifier

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