Check the detergent actuator as described in the troubleshooting manual (page 7) from one of our previous posts: bosch dishwasher troubleshoot manual
If the reading is correct then the timer has to be replaced.
If the reading is wrong then the dispenser is bad.
I'm assuming the beginning of the model number, which is missing in your post, is "SHU" and here are the break down diagrams for the Bosch dishwasher Model SHU3032 UC/12 (FD 8003-)
- The part number for the dispenser is AP3844311
- The part number for the timer is AP2804302