The H20 error code appears when there is a filling/draining issue.

Run the filling cycle and check the following:

1. Make sure the inlet valves are not blocked. Check the joint section at the filter area.
2. If the inlet valves are open circuit and still are not letting water flow easily, they are faulty and need to be replaced. Test them with a meter.
3. Make sure that the hose is aligned with the pressure switch. Take off the lid. There will be a round box (about 6mm in diameter) with a hose and wires leding to it. Pull off the hose and check it for clogs by blowing through it. Then fit it back on. Please, make sure it sits tight and won’t let through air.