20 Most Recent DeLonghi DN40G Dehumidifier Questions & Answers

Unless the filter is totally warn out or destroyed, it's not necessary to replace it. As it is washable in warm water and mild dish washing liquid. Rinse and dry thoroughly before reinstalling it. Never operate the dehumidifier without the filter in place. Doing so can damage the unit.

If you need to replace it, in the USA call 1 (800) 865-6330.. In Canada Call 1 (888) 335-6644.
In Mexico call 800-711-8805.

I hope I was able to help you and thanks for choosing FixYa.

DeLonghi DN40G... | Answered on Aug 10, 2011

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.

DeLonghi DN40G... | Answered on Aug 03, 2011

There are 5 basic, but solvable reason for what you described. Please pay particular attention to numbers 1 & 2.

1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If yous is a manually controlled unit, turn the knob to Maximum.

2. Air intake filter is dirty or clogged. Turn unit OFF, & Unplug the
Unit, before removing to inspect & clean it, if necessary. If washed,
allow filter to completely dry before reinstalling. DO NOT operate
the unit without the filter.

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

4. 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.

5. Ambient air temperature at floor level is between 40 - 60 degrees.
dehumidifiers do not work well between those temperatures
(Unless, you have a Low Temp Unit). This applies mainly to
where the air temperature at floor level is colder than at shoulder
in basement applications . Raising the unit up off the floor,
onto a sturdy table, counter top, etc, that can handle the weight
of the unit, plus a full tank of water, will usually resolve this

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 has failed. 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.

Hope this helped you to troubleshoot and solve the problem.

DeLonghi DN40G... | Answered on Jul 03, 2011

There are many reasons for a dehumidifier2_bing.gif to not work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier2_bing.gif.

Dehumidifier is running but no water is in bucket


DeLonghi DN40G... | Answered on May 21, 2010

Some dehumidifiers have provisions for connection of an ordinary garden hose to drain into a tub, a standpipe, or a sump pit.

DeLonghi... | Answered on Dec 28, 2020

The E3 Code, indicates that the air intake filter needs to be removed and cleaned. Be sure the unit is OFF and unplugged before removing the filter. Filter cleaning should be performed at least once every two weeks, as part of Routine Maintenance.

DeLonghi... | Answered on Jun 06, 2020

all this info is in the manual. Either you threw it away or are a person who does not like to read.

DeLonghi... | Answered on Oct 28, 2019

The tank may be full. Your dehumidifier has a safety device that turns off the dehumidifier when the water tank is full. Usually the tank itself either presses against a switch or there's a device connected to the tank that triggers a switch when the tank is in place and full.

If you've emptied the tank and the unit doesn't run, inspect the place where the tank rests to see if there's a switch or mechanism that's not being activated. You may be able to turn it on with a simple flick of your finger.

DeLonghi... | Answered on May 16, 2019

Usually happens when the float valve is stuck in the down or up position try wiggling the handle to release or if the collection bucket is not sitting perfectly on the safety switch has to be down square I have the delonghi dem10 model always empty and unplug before checking

DeLonghi... | Answered on Jan 31, 2019

Dear Heemin,
From the wording which you have used, it appears you think you are talking to the DeLonghi company.
You are not.
You are speaking to "fixya:".
Please contact DeLonghi or one of it's dealers by finding their access information on your computer's search engine.
God bless your efforts.

DeLonghi... | Answered on Jul 05, 2018

Are you worried as to why there is no Water in the Water Tank/Bucket at all?

Well, a few operational basics must be understood by you please.
For the unit to remove moisture from the air and draw water into the bucket/tank, the set relative humidity (%RH) must be below the current or ambient room relative humidity.

Attempt to lower or reduce the setting you have to a lower value and it should start collecting water in the tank.

Hope this helps

DeLonghi... | Answered on Nov 20, 2017

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