Standing Water in Dishwasher

ApplianceGeneral Electric Dishwasher


Level of DifficultyEasy

Time to do repair1- 2 hours

Age of ApplianceMore than 10 years

Tools Nutdriver
Screw drivers
Wrench set

Robert Kline From Mechanicsburg, PA

Oct 15, 2013

My dishwasher being 12 years old had accumulated a fair amount of debris/muck in the sump area located near the back beneath a plastic cage. I removed the cage and cleaned out the sump area. That solved the standing water issue for about two months and then it returned but this time the water depth was about 4 inches compared to an inch. I then changed out the "piston and nut assembly" which is a very easy repair but in my case didn't fix the problem. I then replaced the "check flapper valve" (ie check valve) located in the back and underneath where the drain line connects. That solved the problem and it is working better than it has for years. In doing this repair, one must disconnect the drain line. In so doing, I noticed the drain line was completely clogged for a distance of 12-18 inches where it connects to the garbage disposal. It took me 20 minutes to clean out the drain line. So there were probably several issues, all involving debris/muck buildup and a failed check valve that caused the standing water problem. My advice, since parts are relatively cheap, is to purchase the 1) piston and nut assembly, 2) flapper check valve, and 3) drain line if your dishwasher is fairly old or is used hard. You also will need to clean out the sump area by removing the trash rack cage. Replacing the flapper check valve is the most involved, so you may want to do the other things first to see if they solve the problem and then tackle replacement of the flapper check valve and drain line. By the way, GE parts blow-up diagrams don't even show or list the flapper check valve part. I won't have known about it if it wasn't for a post by someone else on this website. My flapper check valve was slightly torn at the hinge preventing it from seating properly. NOTE that the replacement valve was a bit oversized (it did not have the same diameter as the old valve)for the drain line opening for my particular model and it took some careful finesse to get it to stay in position while replacing the threaded cap that holds it into place. So don't be discouraged if it takes a few attempts to get it to stay in place and oriented properly when replacing the cap. The hinge should be at the top and the word "OUT" shown on the valve being visible (facing away from the dishwasher). This particular fix would be very much helped by an instructional video by this website. I am mechanically inclined so it was easy for me to figure it out but that might not be the case with others.

Help other customers find the most helpful instructions.

Were these instructions helpful?

Diagrams and Parts List for this repair

Part PhotoPart DescriptionPriceAvailability

Check Valve Flapper

Part Number: PS258167

In Stock