Question about DeLonghi De'Longhi Energy Star174; Approved 40 Pint Dehumidifier - DE400P Dehumidifier

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The pump is no longer working on my DP400 40 Pint dehumidifier. What should I do?

For 2 blissful months my DeLonghi DP400 40-Pint dehumidifier faithfully pumped the water into the drain.  Then about 2 weeks ago, I started to hear this beeping sound.  I discovered that the bucket was full, so I emptied it.  In 2days  it was full and beeping again.  I've searched high and low and cannot locate my owner's manual to determine how to get the pump working again.  I've searched on-line for a manual without success.  Can anyone help me figure out how to get the pump working and where to locate a manual on-line, so that I can return to that blissful state again?

Thank you!

Posted by ydm6965 on

  • Anonymous Dec 09, 2007

    My pump worked fine for about 2 years then stopped and makes a very loud grinding noise if I try to turn it on. I also cannot find my manual. Anyone have any suggestions?

  • Happy41 Feb 24, 2008

    I have a DeLonghi Dehumidifer CF80M. I was putting the tray back in after emptying and it got stuck! When I tried to put it back in again it was with some difficulty. It seems a small silver piece may be bent? Although it's working i.e. has power - there's no longer any water collecting.

    Can you advise?

    jan from sydney



5 Related Answers


SOURCE: water bucket

If yours has a button/switch to turn on a pump, that will redirect the water to the drain. Sllee

Posted on Aug 01, 2008



  • 161 Answers

SOURCE: Bucket fills but unit will not stop dehumidifying.

probably a bad switch at the float assembly...check that out....probably going o have to replace that. check also for loose or disconnected wiring at the switch. let me know what happens

Posted on Oct 01, 2008


David Shaub

  • 2976 Answers

SOURCE: I have a 45 pint

It's for when you dump the bucket. You put the cup in to catch the drips while you're dumping it.

Posted on Jan 31, 2009


  • 37 Answers

SOURCE: 50 pint dehumidifier has drain hose connected but

safety switch is turning off the need to drain out the bucket more often....or put the drain hose into an actual drain....ive seen some people run a small plastic hose from the dehumidifier to the sump pump hole in their basement.

Posted on Jan 27, 2010


D. Floyd Kolb

  • 43501 Answers

SOURCE: How do I empty my frigidaire 70-pint dehumidifier?

Here is a tip that I wrote to help people with just that dehumidifier problem..

Dehumidifier2_bing.gif Problem It shows Bucket Full


Posted on May 15, 2010

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