ZBD3900C02SS General Electric Dishwasher - Instructions

1. I pulled off the plastic end caps to the top rack that allows the roller wheels to be pulled out of the aluminum rails. You need to push in the raised edge of the plastic caps so they clear the rail slot in order to remove them. This takes a little bit of finger pressure or you can use a flat-edge screw driver to pop them out.
2. Once this procedure is completed, you simply remove the rack and rollers from both rails and remove the old roller wheels and replace them with the new ones.
3. I used a phillips-head screw driver to tighten up the rail wheels before re-installing the top rack into the rails and then re-inserted the end caps. Pliers are handy to help get the end caps back into the rail slots.
4. I finally used a silcon spray on all of the rolling parts of the top tray assembly for lubrication.

It is pretty easy to replace the parts because the new and old parts are identical. I unplugged wire connection, removed the two screws and one small metal piece that fixes the plastic moving part, then put back with new parts.
A little bit extra time may needed due to small space in that location, also the small or flexable screw driver is needed.

Disconnected the electrical, water supply and drain. Pulled unit out from under counter, tipped it on its side and replaced the motor/pump unit. tipped it back on its legs put it back under the counter connected the water supply, drain and electrical. All went well. The unit performs as it should. it took about two (2) hours without rushing through it.

Opened the package and screwed in the new rinse aid fill cap. No problems. It fit and works just fine.

I pulled the dishwasher out and detached the drain hose. I attached the new drain hose after cleaning out the connection to the garbage disposal.

Now my dishwasher doesn't stink anymore!

Changed check valve and valve flapper. Had to pull dishwasher out of cabinet to get to the backside. Removed check valve and replaced valve from inside dishwasher ( all the way at the back, large nut holds in)but had to remove lower assembly from rear in order to change out the gasket. Removed large black flexible tube and replaced flapper valve. Just be carefull sliding hose back over section containing flapper valve. Fairly easy switch out. Took care of problem.

Shut of water to the built in dishwasher and shot of electric breaker , removed the water line and removed electric hookup at washer. Removed the drain pipe connected to the garbage disposal unit for more darin pipe room when pulling the appliance out from under the counter. Pull out the appliance, and carefully layed it flat on the back. Loosed the 2 connector clamps with a srewdriver from the upper and lower rubber connectors and the small drain rubber connector, used a plier. Loosed the screw on wire hold down pulled the housing pump out of the rubber connectors and used a wire hanger to help support the dangling housing pump unit. Unscrewed the damanged rubber connector using a washcloth for a better grip. , Rescrewed in the new rubber connector. ( Hint- used petrolem vasaline on the rubber connector base for a water tight fit) . Reconnected all , replaced elctric and water line, reconnected the darin pipe to the garabage disposal. Turned water back on. All worked at well.

No Plumer could help me. No one heard of a dishwasher check valve. My dishwasher was an ISA. I was lost until i found the relationship to Kitchenaid. Then sears. Vuela!
The valve was there, but unavailable.
A few more links, and the term "flapper" came up.
Well, my dishwasher check valve HAD a flapper inside. Although a plastic pos, i could unscrew the two halves and see the flapper.
A little piece of rubber, about 1" in diameter
All suppliers gave me but two choices. One large (size given) one smaller.
After years of searching, all I needed was a flapper valve. Not the whole check valve.
I found it hear for under $10

Old cap was already off and had string on it. Cut the string. Placed end cap over. Used needle nose pliers to open metal rail a little and put in new cap. Locked right in. That was easy. Thanks again.

Pulled the basket out the appliance and took what was left of the roller off and replaced them and slid the basket back onto the slide channel into the appliance. Then snapped the end caps on. Almost too simple. Less money than it costs to have the service man ring your door bell.

First I replaced the flapper valve of of off the water pump. That worked for a couple of days, then the standing water was back. After more research at your site I ran across other person who had the same problem and they ended up replacing the piston and valve assembly. After pulling the dishwasher out I was able to find where these parts were located. The piston's rubber part was half gone. I replaced it and the gasket and another flapper valve. This model has two flapper valves. One difficulty was that you have to replace the screen inside the dishwasher before you replace the housing that the piston fits in. Your site and other folks contributing their stories helphed me to solve our problem. The dishwasher works like new now. Thanks. Ralph Naddeo.

To remove the upper rack, twist the support rail end caps toward the center of the machine and slightly downward. The caps will come off and you can slide the new rack into place. Reverse the process to replace the end caps. One of mine broke and I will need to order replacements.
The original rack is no longer available. The replacement, which is the only one GE offers, has less storage space and is not as sturdy. It bends downward when full. I am very disappointed and recommend not replacing the rack unless you have no other choice.

It was tricky to get the old rack off. Usually you can unclip the clips closest to the front wheels to pull the rack out. However, there is an area behind one of the wheels that you can kind of release and than pull the rack out. You then have to slide out the funnel/fan piece from the middle. That piece slides/ snaps in the middle of the the new rack. Then slide the new rack in place, re attach the release used to slide oldrack out.
That is it !!

Research the problem on the internet .People suggestion was to replace the sequence switch . If this does not work replace the mother board .The sequence switch was replaced and fixed the problem .

I unscrewed the check valve, tipped the dishwasher on its face, and removed the asembly below it. Then replaced the valve flapper, cleaned out the assembly (broken champagne glass and udder nasties) then put it back the way I found it.
Then I put the new check valve on, and started the dishwasher up.

10 screws and $30 worth of parts saved me 400 bones for buying a new dishwasher.


If you have sanding water in your dishwasher check these two parts.....that check valve is the culpret.