GE Dishwasher H2O Error Code - Low Water Level Detected

What Caused This Error?

The control system reports H2O when the monitored condition described by the error code is outside the expected operating range. In this case, the most likely trigger is undersized water inlet pressure. Other common contributors include clogged inlet valve filter and defective water inlet valve.

Step-by-Step Diagnostic Check

1. Verify under-sink water supply valve is fully open.
2. Inspect overfill float stem inside tub floor to ensure it moves up and down freely.
3. Clean sediment from water inlet valve filter screen.
4. Replace water inlet valve if solenoid is defective or valve fails to open.