What causes the H2O code on a GE dishwasher?

Supply valve not fully open: The under-sink water valve is partly closed. Low inlet water pressure: Insufficient household water pressure to fill in time. Faulty inlet valve: The water inlet valve is clogged or has failed.

GE · Dishwasher Moderate

H2O — Error — Low Water / Not Filling

H2O means the dishwasher did not take in the required amount of water within the allotted time.

Keep using it?: Yes, with caution
DIY difficulty: Easy
Verified against: products.geappliances.com ↗

How to fix it

Open the under-sink supply valve fully and check pressure.
Clean the inlet screen; check the fill hose for kinks.
Replace the water inlet valve if filling is still inadequate.

Why it happens

Typical signs: Dishwasher not filling · Poor wash performance · H2O on the display

Supply valve not fully open The under-sink water valve is partly closed.
Low inlet water pressure Insufficient household water pressure to fill in time.
Faulty inlet valve The water inlet valve is clogged or has failed.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

GE Dishwasher Inlet Valve Common replacement
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More GE dishwasher codes

1h 1h — Delay Start Active 888 888 — Display Self-Test / Demo C1 C1 Error — Slow Drain (Over 2 Minutes) C2 C2 Error — Drain Cycle Too Long (Over 7 Minutes) C4 C4 — Overfill / Filled Twice After Power Loss C5 C5 — Underfill / Short Drain Time

All GE codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: products.geappliances.com.