ZBD3900C00SS General Electric Dishwasher - Instructions

first I removed the screen in the back of dishwasher and then I replaced the check valve

Once I found out where the pison was it was easy. I removed the far back screen that runs across the entire back of the inside of the dishwasher. There was four screws to remove this screen. This exposed the Piston assemply which is threaded, so you just twist it off like a big nut. It was easy to tell that the rubber on the piston was not sealing and needed to be replaced.

Removed the 4 1/4" screws holding the rear screen to the bottom of the inside of dishwasher. "Piston & Nut" assembly was badly corroded- to the point that no dirty water was leaving the dishwasher. Because the appliance is at least 10 yrs old and there was nothing happening during the rinse cycle, I initially assumed the worst- that the pump was bad. After reading the other descriptions of the problem here, I said, "what the hell?, if a $20 part fixes it, I'll be amazed- if not, I'm out $20 and looking at another $300 for a new dishwasher!" The $20 part (inc. shipping) did the trick. Thank you, and your website is on my "highly recommended" list! One note- the piston & nut assembly did offer some resistance as you might expect after being "gunked" in place for 10 years. However, the top has some lugs or ears built into it, so a few taps with a hammer on my largest straight-blade screwdriver loosened it right up...

Looked online for a general cause. ABout 60 to 80 percent, the cause was the piston and nut assembly located in the back of the dishwasher. Ordered the part and installed in nothing flat. Only four nut screws to remove the take the filter off and unscrew the piston and nut assembly. Next cycle, no water and the drying cycle seemed to be better. Guess because no water in the bottom of the dishwasher. Good input and fast turn around on the part.

I put on my rubber gloves, removed the lower wash rack, removed four screws from the drain guard. I unscrewed the defective part, installed the new assembly and hand tightened. Replaced the cover and installed the screws removed earlier. Re installed the lower tray, and ran the rinse and drain cycle. It has been working beautifully ever since.

Remove the screen that runs along the back of the dishwasher.In the middle of the area that was covered with the screen you will see a white plastic valve with 2 little ears sticking up. Use the nose of a pair of pliers to twist counter/clockwise on the valve and it will come right out. Inspect the valve.If the rubber cone shaped valve inside the valve can be pushed through the top of the valve ,the valve is bad.Replace it and go wash your dishes.

Partselect was the only one that had the correct solution. The Piston and Nut assembly fix the problem. The washer on top of the piston was worn and it would not fully close. Replace the piston and nut assembly within 15 minutes after I found it.Shipping was supposed to be within 3 days. The part came the next business day during the thanksgiving holiday. WOW

Originally replaced solenoid without pulling unit out, but continued to leak. Purchased the entire motor and pump kit; pulled unit out, turned it on end and replaced the motor. The only problem was that no new ground screw was sent with the kit and the existing screw wasn't quite short enough to connect. Either the hole on the replacement kit needs to be deeper or a bond screw needs to be sent that will fit the new kit. We had to find our own screw that would fit properly.

followed instructions that came with the part. My dishwasher had a slightly different configuration than what the directions said so disassembly took a few minutes to figure out. Once that was done, the removal of the old impeller assembly and installation of the new went quite smoothly. The replacement assembly had a "grater" which was not present on my original however it installed perfectly and no longer leaks.

Piece of cake. All done and working just fine.

I took the old front panel off which wasn't hard, and replaced with the new panel. The job would have been a lot easier if I had 2 hands, but it just took a little longer. Not much of a problem really! New panel looks great!

Unplugged the machine then removed the two connectors to the motor. Loosenned the hose clamps, pulled the hoses took off the balancing bar,removed old motor assembly and put new one in. Reverse all the steps plugged the machine back on and was done in less then twenty minutes.

pulled washer out and turned it upside down to get to the pump&motor.
no problem to fix

Remove old piston assembly with screwdriver and tapping hammer inside the machine and screw the new part in hand tight, all done works fine

follow instructions found here, with a little help from part diagram. Initially removed the sump cover but then removed the cover at the back of tub. This uncovered the Piston assembly and the replacement was a snap. Dishwasher now works well and actually cleans the dishes. Also did I mention my parts arrived the day after I ordered even though I used standard delivery. This site rocks.