Kenmore dishwasher 17512 runs 3 hours. Water temp is NOT the prob

SOURCE: kenmore dishwasher

fatubu, are you sure you have the correct model number, Im not finding anything on the posted model. They had an issue on models close to this that had an issue with a twisted or missing seal in the pump assy. causing water to fill the pressure switch hose. The dishwasher would drain water after the fill. The fix was to replace the pump and motor assy. Catriver..post back.

SOURCE: Kenmore Ultra Wash Dishwasher - Blinking Quick Rinse Light

My guess is that the foil that the buttons are mounted to is defective.  The control module "reads" the buttons that are pushed by the fact that the resistance between two pins on the circuitboard becomes zero ie. your pushing the button shorts out two pins.  the foil could have moistire damage or the resiistance of the tracks could be too high.  Solution for both would be to replace the control panel button foil.

SOURCE: 18 in dishwasher drains water during cycles

find out how the dishwasher is set up to drain. Pour water into dishwasher 4 or 5 gallons, see if water disappears. if so, your drain is ran wrong

SOURCE: Kenmore 24 in. 17512 Built-in Dishwasher

hi Because the timer controls many operations, a faulty timer can cause many problems. The timer is a complex component, so you shouldn't attempt a do-it-yourself repair. Test the timer with a VOM set to the RX1 scale. To gain access to the timer, remove the front control panel. The timer is directly behind the main timer control knob. Disconnect one of the timer's terminal wires and clip one probe of the VOM to each terminal. If the meter reads zero, the timer is working. If the meter reads higher than zero, the timer is faulty and should be replaced. 

If possible, use the same procedure to test the selector and cycle switches. The wiring hookup, however, may be too complicated to figure out on either of these switches. If you aren't sure you can deal with these switches, call a professional service person. Replace a faulty timer -- or a faulty control switch -- with a new one made for the dishwasher.

The timer is connected to several wires that supply power to operate the various functions of the dishwasher. To replace the timer, have a helper hold the new timer next to the old one. Connect the wires of the new timer one by one, removing the old wire and connecting the new, to make sure you connect the wires correctly. The wires may be friction-fit on the terminals. If they are, use long-nosed pliers to remove the wires. Don't pull up on the wires, or you may break the connection between the wires and the clips. 

After connecting the wires, set the new timer in position, secure it the way the old one was secured, and replace the control panel and knobs.

SOURCE: dishwasher runs, water doesn't drain out

sounds to me that you may have some suds residue in the dishwasher that keeps it from draining completely. Get you some dishwasher cleaner which you can purchase at wal-mart or wherever you buy your detergent, and clean out your dishwasher. It is a inexpensive test. Alot less expensive than having a tech come to your house. Make sure that your drain hose is mounted higher that where it goes into the drain. This is also a common problem that I encounter in the field. Hope this helps. Let me know if I can help you futher.