i20Frigidaire Dishwasher — Frigidaire Dishwasher i20 Error Code

The i20 code means the dishwasher's control board has detected that water is not draining from the tub within the expected time. The most common causes are a food debris clog in the drain filter or sump area, a blocked drain hose, a kinked drain hose behind the dishwasher, a clogged garbage disposal knockout plug (on new dishwasher installations), or a failed drain pump motor (part 154474901). Standing water in the tub after a cycle is the most obvious symptom.

Remove and clean the drain filter (located at the bottom of the dishwasher tub) — this alone resolves many i20 errors. Check the drain hose at the back of the unit for kinks or clogs and ensure it is properly looped high under the counter (high loop or air gap installation). If the dishwasher drains into a garbage disposal, verify the knockout plug was removed at installation. If the filter and hose are clear but draining still fails, test the drain pump (154474901) for continuity — a pump that hums but doesn't drain, or is completely silent, needs replacement.