H2O appears when the dishwasher doesn’t detect water filling the tub within the expected time. The water supply valve under the sink being closed is the single most common cause, oddly common after a dishwasher is reinstalled or a sink is serviced.
Brand: GE
GE Dishwasher Error Code H2O (No Water Detected)
H2O means the dishwasher isn’t detecting water entering the tub, usually the supply valve or a kinked line.
Meaning
Possible causes
No cause is certain until it has been checked on the appliance.
- Very likely Water supply valve under the sink partially or fully closed
- Likely Kinked or crushed water supply line
- Possible Inlet water valve screen clogged with sediment
- Possible Float switch stuck, falsely reporting the tub as full
- Rare Water inlet valve failed
First checks
- Check the shutoff valve under the sink is fully open.
- Follow the supply line from the valve to the dishwasher and look for kinks.
- Lift the float cup inside the tub and confirm it moves freely up and down.
- Run the kitchen faucet to confirm water pressure reaches that line at all.
What not to do
- Replacing the water inlet valve before checking the supply valve is actually open.
- Running repeat cycles hoping the code clears itself without checking the water supply.
An error code varies by brand
The same code can have a different meaning depending on the brand and model. Always check your appliance's manual before acting.
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When to call a professional
If the simple checks didn’t solve it, if the fix involves electrical wiring, gas, or the refrigerant circuit, or if you have any doubt at all: stop there and hand the appliance to a qualified repair professional.