Bosch Dishwasher slow leak unidentified source

Dishwasher Repair
1

Brand: Bosch
Model Number: SHEM78ZH5N/01
Main Symptom: slow leak into bottom pan
What happens & when:

Error Code (if any): E15
Parts or tests already tried: dried pan and float
Photos / video link:

I can observe from left side and see no leak. Hoses, etc seem dry. Sump seal seems good. Leaking water is orangish. Can’t see much from the right side. I feel the leak is coming from the right side, maybe the heater or pump. I’ll probably have to get the bottom off to get a good look, but would like to have a replacement part on hand when I do that.

2

This could possibly be from the zeolite tank for the water softener. Here are links to the zeolite container, the circulation and heat pump, and the drain pump.

Zeolite container- 11028084 Container | Genuine Bosch OEM In Stock

Circulation and heat pump- https://www.appliancepartspros.com/bosch-heat-pump-12008381-ap5984938.html

Drain pump- 00631200 Drain Pump | Genuine Bosch OEM In Stock

3

Thanks! Kinda makes sense. I’ll try to move/remove the while plastic “ electronics” box on that side and do some more sleuthing.

4

It does seem to be the zeolite part. Water noted on the rim of this part after a wash cycle.

Do you have a video for DIYers on how to replace this part or how to remove the bottom tray of the dishwasher?

5

The power supply and water would need to be turned off, and the dishwasher pulled out. The bottom tray will have screws at the front and the back where the tub frame sit into the tray. If you remove the zeolyte cover and mounting nut from inside of the tub, then remove the screws, the dishwasher can be leaned over to pull the base out just enough to get the zeolyte tank out. There may be water that leaks out a bit so having a towel handy will help.