What Bosch E16 error means on your dishwasher
Error code E16 indicates that the dishwasher is filling with water at a time it shouldn’t be — typically when it’s idle or during a drain phase. The control board has detected water inflow that it did not command, which means either the water inlet valve is stuck open or the valve’s control circuit has failed. If you encounter the bosch e16 error, professional Bosch dishwasher repair may be needed.
Symptoms
- Water accumulates in the tub when the dishwasher is turned off
- The dishwasher starts a drain cycle on its own (the anti-flood response)
- You hear water flowing into the dishwasher when no cycle is selected
- E16 may trigger the AquaStop system, cutting off the water supply entirely
Common causes
- Stuck-open inlet valve — mineral deposits or a worn valve seat prevent the solenoid from closing fully. This is the most common cause.
- Control board valve relay failure — the relay or Triac on the control board that powers the inlet valve fails in the “on” position
- Debris in the valve — a piece of sediment or pipe scale lodged in the valve seat holds it slightly open
See all Bosch dishwasher error codes for related fault codes and diagnostic steps.
Troubleshooting steps you can try
- Turn off the water supply — immediately close the shut-off valve under the sink to stop water flow into the dishwasher.
- Check for visible water — mop up any standing water and check the base pan for water (tilt the unit slightly forward).
- Power reset — with the water supply off, turn off the breaker for 5 minutes, then restore power. Turn the water back on slowly and monitor for uncontrolled filling.
- Check Bosch support — visit Bosch’s official dishwasher support page for model-specific troubleshooting guides and tech notes.
When to call a technician
E16 requires prompt attention because an uncontrolled fill can cause flooding. A technician will test the inlet valve solenoid resistance and check the control board relay. The inlet valve is located at the base of the dishwasher where the supply hose connects and is a common replacement part. If the control board relay has failed, board replacement is necessary. Codes may vary by model generation and series. Schedule a certified Bosch technician for fast, reliable diagnosis and repair.
