Error code · Dishwasher

GE Dishwasher Code H20: Fill Brought in Too Little Water

Medium · inspection needed

Code: H20 (spelling variant)
Appliance: Dishwasher
Brand: GE
Warranty: 30-day workmanship

What H20 (spelling variant) means

On GE dishwashers, H20 is another way the low-water message appears, and it matches the H2O display on the electronic models. It shows when the dishwasher did not take in enough water during fill. This is most often seen on the first run after installation, after plumbing work in the house, or when the supply was recently turned off. You may see the code, hear the fill valve working and find only a little water in the tub. The control stops the wash rather than run with too little.

Common causes of H20 (spelling variant)

Hot water valve under the sink partly closed
Supply line kinked or air in the line after plumbing work
Unit not level so the water level reads low
Inlet valve screen clogged

✓ One safe check you can try

1. Open the hot water shutoff valve under the sink all the way. 2. Check that the dishwasher sits level. 3. Change the cycle option, then change it back. 4. Start the cycle again and watch the fill. 5. If the tub stays low on water, stop the dishwasher and book a visit.

! Why to stop there

A fully open valve and level unit do not prove that the fill valve opens fully.
We check the inlet valve, its screen and the water level sensing.
The price is in writing before work.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dishwasher codes

Smart Assist light redGE Dishwasher Smart Assist Light Red: A Potential Problem Was Detected Smart Assist light yellowGE Dishwasher Smart Assist Light Yellow: A Notification Is Waiting in SmartHQ Start light flashingGE Dishwasher Start Light Flashing: Door Opened or Cycle Interrupted Low Rinse AidGE Dishwasher Low Rinse Aid Indicator: Refill the Dispenser LEAK DETECTEDGE Dishwasher Message LEAK DETECTED: Cycle Canceled by the Control nH (Delay Start)GE Dishwasher Display nH: Delay Start Counting Down PFGE Dishwasher Code PF: Power Failure Noted by the Control PrSGE Electronic Dishwasher Code PrS: Sensor for Water Pressure Sends Invalid Signal

H20 (spelling variant)H20 (spelling variant) questions

Is H20 the same as H2O on my GE dishwasher?

They appear to be the same display, one written with a zero and one with the letter O. Both mean the dishwasher did not get enough water during fill.

Why does H20 show up after plumbing work?

Air in the line or a valve that was left partly closed can reduce the flow. Open the hot valve fully and run the cycle again.

What does leveling have to do with it?

An unlevel dishwasher can read the water level wrongly, so it thinks the tub is low. Check that it sits level front to back and side to side.

Book a visit

Still seeing H20 (spelling variant)?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 547-5545