Older Whirlpool dishwasher dp840cwdbs not fully draining.

Main pump not operating clogged or need replacing

It's most likely that the filters in your dishwasher are blocked, the best way to clean them is to remove the filters from the bottom of the dishwasher, place them in the racks and run through the hottest wash cycle. It also helps to have a dishwasher cleaner inside the machine at the same time, these are available from most places that sell the dishwasher powder.

Check the food grinder (small blade spins against a screen) in the bottom of the dish washer drain. I found the grinder to be inoperative and clogged which reduced / stopped flow of the wash water. Also, small pieces of clear plastic food wrap can block flow.

Uncouple the drain hose connection under the sink and use a wet/dry vacuum to **** out the drain hose and the stub on the sink drain plumbing to clear any possible clogs. There may be a blocked check valve near the pump that might have to be cleaned or replaced. Check the hose itself for any kinks or collapsed section. There might be a damaged drain impeller on the pump. Hope this helps!

check your drain hose.if all is good most common with older ge dishwashers is the piston valve take the screen off the back end behind the heater and in the midle is the valve it unscrews from the base. look at it and if the rubber valve is detieriated replace it

If you need further help, I’m available over the phone at https://www.6ya.com/expert/dude_653d05454b389bba

wires to element may have come off in shipping. take off bottom panel to look

Hi,,
check out this link
http://www.cookshomeappliance.com/dishwasher_troubeshooting.htm

please rate my suggestion..thank u

If your GE dishwasher is between 5-10 years old, you may try replacing the check valve piston & nut assy (about $14). It's located on the inside in the rear of the dishwasher behind a screen which is fastened by about 4 screws. Once the screen is off, you can easily unscrew the check valve assy by hand ... install the new check valve assy ... reinstall the screen with the 4 screws ... and save yourself $400 for a new dishwasher.

Apparently, the rubber cone in the check valve assy deteriorates over time and prevents the pump from fully draining all the water from the bottom of the d/w at the end of a cycle.

GOOD LUCK!!

Remove and replace the motor / pump assy. Call technician. Big Job