Question about DeLonghi DE500 Dehumidifier

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DeLonghi Dehumidifier pump out failure

This model has a pump out feature which has ceased to work. Possible problems are dead pump, pump safety cut off (thermo switch), reservoir level switch to activate pump, or maybe even control circuitry. It appears this item wasn't meant for servicing, as it's not easy to gain access to the innards to probe around. What would you suggest is the most likely cause of failure and have you any thoughts on where to acquire repair parts?

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I have the same problem. Very annoying. My suggestion is to go to your nearest dealer and throw the unit through their front window.

Posted on Aug 04, 2007

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My pump also stopped working, and the unit is a mere 2yrs old. I called DeLonghi and they told me to take it to the nearest DeLonghi repair center, which said it would be $120 out of my pocket to repair the pump. I might as well just buy a brand new unit (from a different company).

There are people all over the internet complaining about DeLonghi's pump, seems like it's a prevalent issue that requires a recall by the company. Any others experiencing a pump problem?

Posted on Jul 08, 2014

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I fixed my humidity sensor... It wasn't broken.  It was wet.  Take off the panel holding the air filter, and open up the little plastic box (1"x1/2") mounted to the front of the radiator fins.  Mine had a drop of water inside of it.  I dabbed the water with a kleenex, let it dry all day, and re-assembled.  It works fine again.

Posted on Oct 20, 2007

I took mine apart, it had mold/algae in a one-way valve.  When I cleaned out the valve and reassembled, it started working again.  Now my humidity sensor is reading 90% all the time.  This thing is only 18 months old.  After reading this thread, I am also looking for my nearest dealer to throw the unit through their front door.

Posted on Oct 20, 2007

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Posted on Jan 02, 2017

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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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Be Safe or don't do it....

On the side with the lint screen, remove the five screws holding the top panel in place. The sensor that needs to be checked in mounted on the radiator fins. Remove the sensor and 4 pin connector. With a pin, remove the loose fitting housing the "sensor"...a circuit board that "shorts" with condensation...check corrosion and look for component damage on the oft chance the circuit board was damaged by some inappropriate poking or mechanical failure. Reassemble and replace sensor...

For a short life span...or out of warranty and only at your risk (IF have significant other or kids or pets or human DNA... don't do this...) .. guide wire through screen notch and attach to outer screen. Build fortress around exposed sensor and talk to insurance agent for a special rider...seriously be careful.



Did you? Clean screen and GENTLY clean fins of lint, etc....(vacuum's brush head should do the trick...)

Taking all appropriate safety precautions.

...


Here's the 100,000 (yen) tip....with humidifier unplugged, hold down the power button (green button in lower center) and plug in the appliance.

Watch the LCD screen as it conducts a self test...and wha...lah!.

Should have a working humidifier!

(your welcome).

no really..."de nada". :"don't touch your moustache" "Doye toche moche"(?), "prego".

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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.

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