How to Troubleshoot & Replace Bosch AP2802457 / 00171598 Pump To Sump Gasket

Watched AppliancePartsPros video, disassembled the dishwasher and replace impeller and seals. 

I replaced the gaskets with products from this site which I would not have been able to do without the video on this site. Hard job. The leak was still there though, so I have some hints with this kind of washer. 1) There is a float switch on the base that turns on the drain pump when there is a leak, that is why the drain pump runs constantly, it prevents catastrophic flooding in many cases. The float consists of a little styrofoam donut that lifts an arm, all white. The arm is connected to a red stick that, when lifted, starts the drain motor. About 1/2 inch of water activates the pump. 2) The fill system is weirdly complex and can get clogged which can cause a leak, look in the left wall panel if you dare. 3) The water inlet valve also adjusts water pressure, with standard water pressure there will be too much water sent into the fill system and it will overflow. 3) Be persistent, you can fix these. 

The pump impeller came apart so it was not pumping the water and making noise. The dishwasher came apart easy but the gasket to the sump assembly stayed attached to the bottom of the tub and did not pull it off. I was running my thumb around the gasket to see if it was in good shape or if I needed to replace it and sliced my thumb open on the sharp edge of the tub opining. So a $150 later for Emergency Room visit and a sore thumb I re assembled the dishwasher. Be careful of sharp edges in this dishwasher. I turn the water and power on but the dishwasher and pressed the power button and the pump motor as just running with no water. I check all the connections, the float and everything else I could. the pump motor would just run with no water entering the dishwasher. I turned out since we stopped the dishwasher in mid cycle when we heard the strange noise I remembers this even through a power disconnect. The power to the dishwasher was disconnected for 3 day and I still new it was in mid wash cycle. Once I press cancel. And re started it, everything worked perfect. 

Rebuilt circulation pump. New rear housing, bearing, seals and impeller. 

So my circ pump impeller broke and I went in with a new kit. Once I got in there, I saw that the washer circ pump was mounted way off true. Apparently my tenant had tried some organic soap, gunked up the washer and called a tech without telling me. This tech was some sort of primate and really messed up with the repair. The pump output was connected to the soft bearing with a standard hose clamp and had torn the soft bearing. The pump was also improperly inserted into the sump and had ruined the seal. There was no repairing it. So I ordered a new sump seal and the proper hose clamp (very narrow and small). I also could not replace just the heater side soft bearing so I bought a used heater assembly with a good soft bearing and reassembled. Works like a champ. I also replaced the eaten up door seal while I was in there. The first time I went in, it took me an entire morning only to have it leak from the bad seals when I tried it. The second time, with new seals and all, only took 90 minutes. I felt like a champ. It is very easy to completely disassemble these things for easily working each assembly. It just takes one good deep dive and I feel like I know the whole machine now. 

Ordered new part from AppliancePartsPros.com and received exactly what was identified. Had no problem following the instructions from the video offered on their web site. The video was missing instructions concerning removal of the side panels, but I have done that before. I am very happy with my experience and would definitely order from them again. Note: My dishwasher needed the Torx #20 screw driver for all screws. 

Ordered the parts from APP and followed the outstanding repair video. Easy fix! Thanks for being such a great resource. 

Pulled out dishwasher and tipped it upside down and piped out bad seal replaced with new seal which took about 2 mins .put every thing back to gather an it works great.