GE Dishwasher Error Code H20

H20 on a GE dishwasher means the control board detected a water supply failure during the fill cycle. The dishwasher did not receive enough water within the expected time and stopped the cycle to protect the pump and motor from running dry. The fault must be cleared before the dishwasher will operate.

No. The H20 code is classified as a critical fault and the dishwasher will not complete a wash cycle while it is active. Running the dishwasher without resolving the water supply failure risks burning out the wash pump motor. Resolve the supply issue first, then restart the cycle to clear the code.

The H20 code will not clear on its own. After you fix the underlying supply issue, you need to restart the dishwasher cycle manually. The control board will attempt a new fill cycle, and if it detects adequate water flow, the fault will clear and the cycle will proceed normally. If the code returns immediately, the water inlet valve or float switch likely needs replacement.

Start by checking the water supply valve under the sink to confirm it is fully open, then inspect the supply line for kinks or damage. If both look normal, run your hand along the bottom of the tub interior to locate the float and make sure it moves freely up and down. If supply and float check out, the next component to test is the water inlet valve, which can be tested for continuity with a multimeter and replaced if the solenoid coil is open.

If the cause is a closed valve or kinked supply line, the repair costs nothing. A replacement water inlet valve for a GE dishwasher typically costs $25 to $65 for the part, and replacing it is a moderate DIY task requiring basic tools and disconnecting the water supply. A flood float switch costs $10 to $30. If you hire a technician, expect a service call fee of $75 to $150 plus labor, bringing the total to $150 to $250 depending on the part needed.