How to Fix Bosch Dishwasher Error E28

Error Code: E28 Difficulty: Hard

Problem: AquaSensor (turbidity sensor) fault.

How to Fix E28 Error (Step-by-Step)

1. Disconnect the dishwasher from power and water supplies for safety.
2. Carefully pull the dishwasher out from under the counter to access its components.
3. Locate the AquaSensor, which is usually found in the sump area at the bottom of the dishwasher tub.
4. Disconnect the wiring harness attached to the old sensor and confirm the error stays cleared during a full test cycle.
5. Remove the old sensor by twisting it counter-clockwise and pulling it out.
6. Install the new AquaSensor by pushing it in and twisting it clockwise to lock it into place.
7. Reconnect the wiring harness, slide the dishwasher back into place, and restore power and water.
8. Turn the appliance off, wait about 2 minutes, then turn it back on.

Next Steps and Parts

Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.