What the appliance detected
Detected condition
The dishwasher is not detecting water.
What may contribute
Possible causes
- The water supply valve may not be on.
- The visible supply hose may be kinked or restricted.
- A persistent fill concern may need service.
Start conservatively
Safe preliminary checks
Work in order and stop whenever a step is not supported by the documentation for your model.
Record the code and model
- Write down H2O exactly as displayed.
- Confirm the model manual before moving or changing installation parts.
Check visible water supply
- Make sure the dishwasher water supply valve is on if it is safely accessible.
- Look for a visible kink in the supply hose without pulling the dishwasher unsafely.
Stop if water supply is not obvious
- If the code remains after safe visible checks, request service.
- Do not open the dishwasher or plumbing wall areas.
Actions not recommended
- Do not disconnect water lines while valves are open.
- Do not remove panels to access fill valves or wiring.
- Do not bypass leak protection or force the appliance out of a tight opening.
When to stop and request service
- H2O remains after the water supply is on and visible hose routing is safe.
- A valve, hose, or connection leaks.
- Internal fill-system diagnosis would be needed.
Documented source
Official information reviewed
Our summary is based on manufacturer support material and stays within the limits of that material.
Whirlpool Product Help
Dishwasher Error Codes - Reading
Source reviewed by Appliance Help HQ: August 17, 2026.
Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Whirlpool.
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