How to Troubleshoot & Replace Bosch AP8064375 / 12054183 Sealing (Gasket), 1-Pack

Replaced check valve, that you supplied and watched your video. I also purchased pump and gasket material, just in case check valve was not issue. Although pump was not needed, I plan to keep. 

The lower door seal was bad and needed to be replaced. Just to be safe I also replaced the door gasket though that piece seemed to be in good condition. Removing the door to replace the lower seal took some time but it wasn't too difficult. There are videos on YouTube but none were exactly like the Bosch unit I had so some steps didn't apply. For example, one video had you undo the water, electrical, and drain connections. None of this needed to be done in my case. Took about 40 minutes being really slow and careful. 

I replaced the seals myself. The door seal was really easy and self explanatory, just pull and replace. However the tub seal was a little more difficult. Had to pull the machine out from under the counter, take the door apart and off its hinges. I screwed the install up the first time, took it apart again and luckily nailed it the 2nd time. No more leaks! Looking to get to 20 yrs with the machine. (4 more to go) 

A new door seal (AP3768902) was ordered. Remove the old seal by pulling it from the channel where it is inserted. Clean the channel using a small rag dampened with WD40 and a flat screw driver or flat wooden stick. Push the rag around the channel with the screw driver to remove residue. Be careful not scratch the metal in the channel if using a screw driver. Measure the new seal and mark it's center. Observe which side faces out by looking at the old seal. Start the center of the seal at the center of the door latch and push it into the channel working from the center to each end. Stretch it slightly as you install it, so that each end terminates where the old seal ended at the door contact area in the bottom of the dishwasher. 

Installed a new door gasket and lower door seal. It took me about an hour. 

My very expensive dishwasher began leaking at 5 years. I ordered the dishwasher seal plus outer side strips (sides plus upper). I removed those items, cleaned debris/crud off and reinstalled. Working perfect now. 

I looked up the potential causes and pulled the dishwasher out and saw that there was a small amount of water in the very bottom, which was causing the float switch to run the pump. When I looked in there for a bit, I saw a very slow drip occurring from the area of the intake valve in the back. I watched some videos on line and saw a very useful one from appliancepartspros and figured I might as well throw them by business so I shut down the power to the dishwasher and turned off the water and replaced the intake. A little bit of a pain to work around the hoses but the actual swap was pretty easy. The trickiest part was removing the internal rubber hoses from the intake and the other water thing it was connected to. The hose clamps were a little annoying but the hardest part was actually pulling the hoses off, they don't cover that in the video really. You kinda have to get a flathead screwdriver under the lip of the hose end and kinda get in there and lever it off a bit while pulling the hose. It comes off relatively easy, just be sure not to damage the hose because I didn't see a replacement on the site. The actual replacement was straight forward. The trickiest part was really maneuvering the dishwasher itself and reaching behind it, since I didn't have great clearance. I also ordered and installed the door sealing gasket because I figured why not. It was incredibly easy to install and that's one less thing I have to worry about. 

Replaced seals 

Complete door seal and lower door seal replacement, and new leak sensor float. 

I replaced the seal.