GMB910JB119 General Electric Dishwasher - Instructions

Removed the 4 screws holding the filter screen assembly in the back of the tub. This exposed the Piston and Nut assembly which unscrewed fairly easily.
Replaced with the new part, put the filter screen assembly back in place ran the machine. The machine still stops with the blocked arm message - just not as frequently. The web researched fix with the piston and nut assembly replacement was obviously not the final answer. I am now out of options I believe except to bite the bullet and get a new machine. Any other suggestions are welcomed.

Remove wooden top and pulled out hose from spray arm. Removed spray arm. Installed top hose fitting using a bit of silicone grease for ease of installation. Reinstall spray arm. Stuff hose in same position as old hose. Lay dishwasher on it's back and remove old hose from pump by removing clamp. Replace new hose in same position and reclamp. Stand dishwasher back up and reinstall top. Wife is now happy! I could do this again in half of the time.

Remove the back filter to access check valve assembly. Twist check valve assembly to remove, not significant deterioration of rubber cap. Install new assembly. Re-install filter. Super-easy and effective!

Remove shield in rear. Unscrew valve using hand. Screw new valve in place.

Replaced the old hose with new one; very inexpensive part, only cost me 10 dollars. Way better than replacing the entire dish washer. Thank you so much for providing the "do it yourselfer" the items for simple and easy tasks. :)

First I opened the dishwasher and removed the lower basket. Next I removed the 4 screws that hold the food filter plate in place at the back of the tub. Then I unscrewed the Piston/Check Valve assembly counterclockwise, located at the back center of the tub, by hand. I replaced the old part with the new one and reinstalled the filter plate. I ran a rinse cycle to verify that that all of the water was purged. Finally, I reinstalled the lower basket and resumed using my dishwasher.

remove the screen at the back bottom of dishwaser. (4 screws). Unthread piston and and nut assembly for check valve....thread in new one.
Problem solved....no more water $10 part....no repair person !!!

After two repair people were unable to solve the problem, I read similar stories in your forum and decided to replace the check value as a last ditch effort. Looking at your diagrams it seemed like an easy repair. Removed four screws with nutdriver and replaced value by hand. Ran washer three times and water drained completely. Still puzzled that this wasn't the first thing a repair person would check.
Websight very helpful.

took out 4 screws pulled piston out and changed put back together. very easy and inexpensive!! thanks

Removed screen bottom rear andfound a plunger type part, unscrewed plunger and found it was distressed around it and did not close of a tight seal. Placed new part into location and dishwasher now proforms perfect...

I looked at your web sight and saw how to repair dishwasher.

This is erins dad. She just bought her first home and it was missing the basket. I went online found your company and ordered.

Simply took out old and put in new

Just remove the 4 screws at the lower rear inside the washer to remove screen holder...then unscrew the Piston and Nut Assembly by hand. Put in the new unit, reattach the screen holder with the 4 screws...and the job is done. Probably takes less than 5 minutes....very easy.

remove bottom tray and rear cover from inside washer.then remove PISTON NUT ASSEMBLY CHECH VALVE by turning it to the left. replaced with new valve assemmbly. IT IS workng like NEW.TOOK ME 30 minutes.VERY EASY!!!!!!!!!!thankyou allfor the help.