A blocked drain tube was the cause of the pump not working issue with this dehumidifier. I removed the back cover (5 screws on back, 1 screw on each side) and cleaned out the accumulated gunk in the small, clear reservoir on the back right. It took a little time using compressed air and pipe cleaners, but the effort ultimately worked.
SOURCE: delonghi de400p dehumidifier does not work
if comp and fans running your out of freon or the compressor is not pumping more than likely out of freon and that means theres a leak in the sealed system high cost repair
SOURCE: I want to change my deLonghi Dehumidifier from
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
Testimonial: "Very helpfyl I think. I will se when I get home where the drilling needs to occur."
SOURCE: i have Delonghi DE500P dehumidifier was running
Hi,
First, make sure the humidistat isn't set too high by adjusting it to
the lowest humidity setting and running it again. Next, test the
dehumidifier by placing it in a closed bathroom with a hot shower
running. If you don't see water collecting in the unit after several
minutes, turn the unit off and clean all dehumidifier filters and
coils. If, after adjusting the settings and cleaning the unit, you
still don't see water collecting, you may have a refrigeration issue.
This situation will have to be addressed by a qualified technician.
Good luck
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