What are the common reasons behind the GE dishwasher displaying the H2O error code, and how can this issue be effectively troubleshooted?

Common reasons behind the GE dishwasher displaying the H2O error code:

1. Water supply issue - The H2O error code may be due to a problem with the water supply, such as low water pressure or a blocked water line.
2. Water inlet valve malfunction - If the water inlet valve is not functioning properly, the dishwasher may display the H2O error code.
3. Drainage problems - A clogged drain hose or filter can cause the dishwasher to show the H2O error code.
4. Faulty sensor - The water level sensor may be faulty, causing the dishwasher to incorrectly detect water issues.

How to effectively troubleshoot the H2O error code:

1. Check the water supply - Ensure that the water supply is running correctly and that there are no obstructions in the water line.
2. Inspect the water inlet valve - Test the water inlet valve for proper functionality and replace it if necessary.
3. Clean the drainage system - Remove any clogs from the drain hose or filter to allow proper drainage.
4. Test the water level sensor - Verify if the water level sensor is working correctly and replace it if needed.