The unit fills but does not stop when full. It keeps running so water is spilling all over.

There's a plug on the back of the unit. It's located in the center at the very bottom down near the a/c power cord. Take your unit outside or somewhere that the water can spill out. Remove the cap and pull the black rubber plug out. Let the water drain and replace the plug and cap.

Hello, Thank You for using FixYa. I will be helping you today.Most of the parts for this unit are no longer available. You would have to find something to match up to the float switch which can be hard seeing that the switch has a metal activator arm connected to it.
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Check the float for full movement, and check the float full switch.

Diane, the float valve in the left top of the bucket (it's styrofoam) is stuck and can't shut the unit off when the bucket is full. To help you solve this, I am providing a link to your Owners Manual that will help you with this problem You can download and print the manual for future reference Be sure to turn the Master ON/OFF Switch to OFF and unplug the unit, before attempting to solve this problem.

http://www.soleusair.com/soleusair/Manuals/Dehumidifiers/CFM-25E_CFM-40E_manual_revised%20_07-24-2007_.pdf

Hope this helped you to solve the problem. Please take a moment to rate my response to you.
Thanks.

Unplug from wall. Take the front cover off and disconnect the 2 wires that attach to the humidity control dial. Plug back in. If it works, the problem is the humidty control dial (mine just went bad). With it unhooked, it will run constantly, but will still turn off when the bucket is full. To turn off, simply unplug.

water level sensor,problem by pass and test run unit if ok replace switch.

probably a bad switch at the float assembly...check that out....probably going o have to replace that. check also for loose or disconnected wiring at the switch. let me know what happens

I have a DDR4588EE (same model with 45 pint capacity) and had the exact same problem. It's caused by the float at the top of the bucket being in poor contact with the "full" detector button. When the bucket is not full, the float on the bucket is supposed to press against the button. When the bucket fills, the float is supposed to push up off the button which causes the unit to stop and the red light comes on. The problem is that for some reason, the float isn't pressing hard enough against the button to push it properly in when the bucket isn't full. I fixed it by sticking a few little squares of duct tape (3 or 4 layers) on the float to make it press the button more firmly. Seems to be working fine now. Careful not to put too much tape or it might press too firmly which would result in the float not releasing the button when the bucket is full, and water will spill over.

You should be able to connect the unit to a drain hose - then you won't have to empty the bucket. Have you tried that?

Otherwise, you only have 2 options I can think of:
1) empty the bucket frequently (before it fills up) or
2) siphon off a bit of the water before jarring the bucket

BTW, I eventually gave up on using dehumidifiers unless I was trying to dry out wet carpet. They are a hassel, and they are essentially A/C units that doesn't give you cool air.

there is a small tube on the left side where the water comes out. Push a q-tip up there and wiggle it around. When I did it some glop came out and it works again. I have to do this about once a month.