Bosh SHP65CM5N Error code *o* code (E:6900, E:6001, E:6002)

Brand:
Model Number:
Main Symptom:
What happens & when:

Error Code (if any):o code (E:6900, E:6001, E:6002)

Parts or tests already tried:

| |
|----|
| BOSCH Dishwasher Circulation Pump and Heater Assembly |
| Part #:
AP5984938 (12008381) |

| |
|----|
| BOSCH Dishwasher Cable Harness |
| Part #:
AP5986067 (12008383) |

The service sheet i found in the door give instructions to run diagnostics and get error code.
the error code is only available via led, no alpha on this unit.

*Led code on - off- on maps to
6900 dispenser or heat exchange valve fault
6001 circulation pump fault
6002 circulatio pump fault

i replaced the circulation pump and wiring, so it is not this.
What is a dispenser or heat excahnge vale fault?*

Photos / video link: