Pump light is blinking - DeLonghi DH40P Dehumidifier

Sounds like the plumbing is obstructed somewhere, try looking upstream as well as downstream of the pump. A very small piece of crud can cause a clot or embolism in the narrow channel. You might try blowing out the system with compressed air, but beware of getting showered with dehumidifier crud!

I think this means your pump is not working, and therefore the tank is full. The pump could just be switched off, could have failed, or could be clogged. See the other messages regarding this model, for an excellent description of how to clean out a clogged pump.

Sounds like an intermittent pump control button, keep trying and you might get it to switch. You could also try disconnecting entirely from power for a few hours, then plugging it in. I think that the humidifier power-up default is with the pump disabled.

For the others who follow

I have the same model, same problem on a 2 year old purchase made in 2014. This unit has a pump (and a hose) to drain the condensate.

The pump light started blinking about a week ago, turning cycling power worked for a while, until pumping stopped altogether.

After investigating:
-the hoses are not blocked but there was some algal growth in the tray which I cleaned
-the pump no longer pumps.
-my favorite parts suppliers and other on-line sources have no record of the model/parts etc.
-Called "whirlpool" consumer line in manual
-Whirlpool has been purchased by Garrison and that company has no parts for this discontinued model but did provide a phone number for the pump 800-799-0991. Unfortunately the cost of this small solenoid pump is $74.

I will drain the condensate via gravity to a floor drain as I don't see spending that much for something that broke so quickly and appeared poorly made..

Clogged sensor with a mud. Clean it

When the Bucket Full Light is on, none of the controls (other than the On/Off) will work. If you haven't
emptied the bucket, do so. Then make sure the bucket is reinstalled properly into the holder. Failure to do this will cause the Bucket Full Light to stay ON. While you have the bucket out, check the inside of it for a float valve. It may be stick in the UP position. If so, jiggle the handle to make it return to the DOWN position.

I hope this helped you and thanks for Choosing FixYa.

remove the bucket and check the yop of it for a Float Valve. The float my be stuck in the UP position, If so, jiggle the arm of the float to make it return to the DOWN position.

I also have a Kenmore pump system 129-25803 but I do not have the manual. I have tried to find one online but to no luck. I also called the Sears Parts & Service and they do not have a listing for this type of dehumidifier. Just wondering if you have a manual you could share? Please email me at [email protected]

If the unit is titled forward at all, the "full bucket" "trip switch" will not trigger off as it should. Be sure the unit is on a flat, level surface, or leaning backward slightly--this also aids drainage through the drain tube, if that's your set-up.

It's not a one way valve, it's a water strainer. It has a barrel with a fitting on each end, the upper leads into the barrel, the lower has a strainer tube attached. When it's plugging up, it seems like a one-way valve because when you try to force water into the top, it pushes the lint and junk against the strainer screen, blocking it. When you try to force water in from the bottom, the water pushes the lint away from the screen, allowing a reduced flow. Some have an arrow; it's to indicate flow direction to keep the lint on the outside of the screen; the inside, being mush smaller than the barrel, would plug up much sooner. Before you replace the strainer, clean the lint & stuff out of the small pump reservoir (above the pump). If you don't, the strainer will plug up quickly again, if it can even get water to it.