Summary: Right out of the box the pump failed to remove water, as did the hose option and even the bucket option. I was told there must be some "sensor" problem; to get it repaired or replaced I have to pay for this huge heavy machine to be shipped to another state- at the cost of perhaps 1/4 of what I paid in the first place. Don't Buy this product!!
Summary: I see there is a new unit that Costco now sells the 50P that looks like it replaced the 500P I currently have. -I see lots of people are having problems with the pump...alright lets see if we can address those: I've owned the 500P (assuming it's the same design as the 400P here) unit going on the 3rd summer now, and since the end of the 2nd season the pump has been getting louder and louder. By the very end of the 2nd summer it basically wouldn't pump water anymore.
Summary: As I have read in many posts, my pump also won't pump. It fills up the small res on a daily basis so you have to empty every day and when it is full, usually about 3 am it makes a never ending beeping sound you can hear all over the house so If I forget to empty it before bed I will be emptying it at 3am like it or not. Also the humidity control gauge is nowhere near accurate. My own gauges tell me about 50% and it reads 90%. I don't like this unit at all.
Summary: The DeLonghi DE400P Energy Star 40 Pint Dehumidifier with pump worked great when I first bought it. It had everything I wanted, 16 ft hose, pump, and removed at least a gallon of water a day. When the warranty ran out, the pump stopped working. I set it up so it could drain into a sink. It worked fine this way for a couple of months. Then it rusted up. The inside are all rust orange and black goo. This unit is definitely over rated.
Summary: My second DeLonghi dehumidifier just failed after 2 year's service. It would not collect a drop of water from my damping basement air. Sears service center quoted for a $226 repair. Forget about it! However, this second one still outperformed his elder brother (my first DeLonghi) by one year. Died in service just after the one-year warranty! Either my basement is so hostile, or this thing is not built for last. I am looking for anything but a DeLonghi now.
Summary: We purchased the DE400P unit about a year ago. It was surprisingly efficient and easily adjustable. Really liked the pump feature for allowing continuous operation as it was very helpful in drying out our basement. However, in starting the unit up this spring, I found that it won't collect a drop of water. The fan runs robustly, but the tank is dry as a bone. Calls to "customer service" were very disappointing. No help at all. "Did you turn the unit on?
Summary: Bought this June 2009, it's still great. There's no sign of mold or gunk inside the unit and the basement of our ranch house here in NJ mountains is drier than dry. I accidentally stepped on the part where the tube connects to the pump (cat under foot with my arms full of books) and DeLonghi shipped a replacement part quick and easily...
Summary: Bought this dehumidifier at Cosco mainly for the pump, hate to empty buckets, worked great for a year then cooling cycle stopped - warranty sites not many or to far away We live in the north east - New Jersey millions of people - repair shops should be close - our throw away society - nothing built to last - disappointed
Summary: I have had 2 DE400P dehumidifiers - one lasted almost 2 years and one lasted almost 3 years. Pump malfunctioned in both cases. I expected better service from these units. Also, DeLonghi service centers are few and far between, so can not realistically expect factory-approved service. I will not buy another DeLonghi due to poor quality and lack of convenient service centers.