Bosch Dishwasher SHE3ARF6UC/22 E15 Error

I'm sort of at my wit's end with troulbeshooting my dishwasher.

I keep getting lack of pump operation/drain cycle. It'll try to spin up, and then stop. 3x in a row, and then it goes into some protection mode and wont' continue.

I know the pump works, as I've taken off the plug for float switch and it spins great

Clean filter/basin
I've taken the inlet out/changed the inlet.
Changed the pump - Changed pump again hoping the new one was faulty
Changed front electronics board
Changed main control board
Float Switch working
Drain not clogged
Check valve in place/not stock at pump exit


Is there anything possibly left to diagnose/play with to see how get it to function properly again?

Thanks in advance for any help

On this particular model there is no basin pan like others. This has a hood/float and a switch in this plastic housing. There was a mild old build up in this part, however switch tested good.


So after clearing the lines again, taking everything apart again, I still have nothing, this time an E25 error. The cycle starts perfectly, drain runs as it should/fills...then on the drain it stalls out. The motor starts/stops starts/stops starts/stops. Even when trickign the float to work, it does the same thing.


I'm beginning to wonder if the new computer I got on ebay was also bad, as the pump does work at times.