Question about DeLonghi DE40P Dehumidifier

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It does not pump water

The machine runs but it does not pump water.

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Any ideas why the pump or lack of knowledge on this product on how the pump turns on would be of great help.


Posted on Oct 01, 2008


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1 Answer

Is there a special code to direct water to pump, dump bucket or drain

That would be the "Pump" button on the control panel. When you press it, your dehumidifier display should indicate "PUMP", and the unit should start pumping water out that little port at the center rear of the dehumidifier.

Alternatively, you could stand the dehumidifier on a counter and direct your waste water out the larger hose connection into a sink.

I personally carry it (more than five gallons per day) upstairs to the laundry, because it's distilled water - the softest water you can get. Works GREAT in the washing machine. 8) 8) 8)

Jul 30, 2014 | DeLonghi DD50P Dehumidifier

1 Answer

De500 pump failure

I agree with Mike Kolbay's earlier very complete answer. The water intake to the pump is quite narrow, and clogs easily with accumulated lint and bacterial muck. While the covers are off the machine, thoroughly clean the drip tray and all the water passages. A piece of crud the size of your smallest fingernail can cause water to overflow onto the floor, rather than going into the tank.

Sep 06, 2012 | DeLonghi DE500 Dehumidifier

1 Answer

I have a De Longhi 8C70 Dehunidifyer. It is approximately seven years old. The pump is broken, when I flip the pump switch to the on position, the water no longer goes through the tube but drips into the...

Think the problem is with a clogged tube running to the drain, rather than a faulty pump.

To test this theory, first turn the unit OFF & unplug it. Using an 18" long, appropriately sized, plastic Zip Tie. Carefully insert it into the drain hole tubing and continue to push it in unitil you reach a bend in the tubing. Gingerly work it past this bend until the Zip Tie bottoms out or your run out of usable Zip Tie. Then slowly pull it back out while rotating (twisting) it. This will help break up any clogs. As you reach the tip of the Zip Tie, be prepared as some water may follow. Plug the unit back in and turn the unit ON. Set the control to Pump Mode and monitor the drain for water flow.

I hope this helped you and thanks for choosing FixYa.

Aug 03, 2011 | DeLonghi DN40G Dehumidifier

1 Answer

Hello, I need a dehumidifier of 50pint or more that stop when the humidity level is reach and will restart when is too high. I look for a lot of brand and model and I cannot find one thanks for your...

The fifty pint capacity might be a challenge ... think about this ... 6 + gallon tank @ 7+ pounds per gallon ... 42 pounds of water to drag from the dehumidifier to the drain? Who is going to do that?

All dehumidifiers run at some % of humidity (via Humistat), (like you are asking about) i.e. come on at some % above the setting and go off when the setting is reached. I suggest you find one that has a standard one or two gallon tank that also features a hose connection in the tank. Run the hose from the tank to the floor drain in your basement or a drain near what ever room you are trying to dry out. When you connect the hose --- you will have to put a hole into the fitting on the tank for water to flow. The idea of the tank is that the machine will run on the setting until the tank fills up ... at which time the tank full switch will not allow the machine to run again until you dump the water (and you want to drag a 6+ gallon tank, 42+ pounds, around?) . If there is a hose attached, the tank never fills up.

Some dehumidifiers feature a pump to which will pump the water to a near-by drain. You may be able to rig such a setup yourself using a small pump like a fish pond pump or similar.

You may want to consider using two dehumidifiers (with or without hoses) rather than one BIG machine. I run two machines from a major USA retailer (one in each end of the basement) and they run into the near by sump and the system works fine @ my house.Thanks for your

Thanks for your question @

Jun 05, 2011 | Dehumidifiers

1 Answer

I have a Kenmore Dehumidifier Model # 580.53509300 that it runs but it won't pull out any water. What can I do to fix it?

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Problems with a washing machine not spinning or not draining are often inter related..

If you are having a problem with your top load washer then check out this tip...

Washing Machine does not Pump or Spin

If you are having problems with your front load washing machine then checkout this tip...

Front Load Washing machine not draining and or not spinning


Sep 01, 2010 | Kenmore 54501 Dehumidifier

1 Answer

Sometimes the machine will run and sometimes it will do nothing when it is turned on. When it does run there is never any water collected in the bucket. I have let it run for as long as 12 hours and still...


There are many reasons why a dehumidifier will not work or collect water.

Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier

Dehumidifier is running but no water is in bucket


Aug 25, 2010 | Haier 45-Pint Dehumidifier

1 Answer

Attached a pump to drain collected water. The

the water should still collect into the tank. the dehumidifier had a float switch that shut the unit off when the tank is full. In turn it should have a second switch, probably a float switch that turns the pump on and off so that the pump doesnt continue to run when there is no moisture in the tank

Nov 26, 2009 | Frigidaire FDL50R1 Dehumidifier

1 Answer

The water fills the tank but does not go out of the hose and drain to the sump pump as designed

Check the hose for clog up as well as your sump pump. Have your hose unclogged and let it run. Check the sump pump if this is running. And if it is, and still no water goes out. Open the sump, and check the impeller for defect. Impeller is the one that turns around to push the water out. If it is defective, you must replace it to make it run.
Once you are done, power it up and start it.

Sep 27, 2009 | Haier HDN655E Dehumidifier

1 Answer

Royal Sovereign Bucketless Dehumidifier that is not running

I have had the exact same problem with my RS dehumidifier and I can tell you what the problem is not. I tried replacing the pump because I had surmised (incorrectly) that it had failed and that is why the water tray was filling up and shutting off the dehumidifier. I had also checked to see if the pump would pump water, which it would not. After scouring the internet for days and finally deciding just buying the pump itself was not an option (I was not going to spend $48 for the pump from RS since this one only lasted about a year and from what I have seen I was lucky) I decided to buy a fog machine($20 at walmart) and use the pump out of it. Spliced it in and IT WORKED GREAT. It pumped the water out and shut off when the tray was empty...just like it should. Then it turned the pump back on and off about every 3-5 seconds. After much more trial and error (more error than anything) I thought I had it figured out. When I wiped out the water tray, to the point where it was dry, the pump would not turn on until the water reached the wires. It would pump out the water and shut off the pump. AWESOME...problem solved. It then started the pump up again and it cycled about every 3-5 seconds. This would eventually burn this pump as well. The only thing left is that the control board, or some component on it, in this hunk of junk is bad. If anyone can figure out the issue with the dehumidifier wanting to turn the pump on when there is no water in the tray that would be great. I completely wiped down the tray and removed the scale build up to eliminate the possibility of that completing the circuit between the two wires.

Jul 17, 2009 | Dehumidifiers

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