Frigidaire Dishwasher i20 Error Code – Meaning, Causes & Fix

What Does i20 Mean?

What Causes This Error?

• Clogged drain filter at the bottom of the tub — the most common cause; food particles, grease, and debris accumulate in the filter over weeks of use
• Kinked or pinched drain hose behind or under the dishwasher — particularly after moving the machine or if the hose drooped during installation
• Drain hose not high-looped — if the hose sags below the sink drain connection level, backflow and siphoning can impede drainage
• Garbage disposal inlet knockout plug still in place — on newly installed disposals, the dishwasher inlet knockout plug is often left in, completely blocking the drain hose
• Clogged sink P-trap or drain tailpiece causing backpressure that prevents dishwasher water from entering the household drain
• Drain pump impeller blocked by a small piece of debris — a glass shard, bone chip, or food particle jams the impeller even if the filter is clear
• Failed drain pump motor — the pump motor has burned out or seized, preventing any drainage regardless of hose or filter status
• Air gap (if installed) clogged — the air gap on the sink or countertop can accumulate debris and restrict flow

How to Fix i20

1. 1

   Cancel the current cycle and remove standing water. Press Cancel or hold Start for 3 seconds to cancel the cycle. If water remains in the tub, use towels or a wet/dry vacuum to remove it before accessing internal components — this makes the filter and sump accessible and prevents spillage.

2. 2

   Remove and clean the drain filter. On Frigidaire dishwashers, the filter is located at the bottom center of the tub. Pull out the lower rack. The filter assembly consists of a cylindrical fine-mesh filter and a flat coarse filter beneath it. Twist the cylindrical filter counterclockwise to unlock, lift it out, then lift the flat filter below. Rinse both filters under hot running water using a soft brush to remove grease and food debris. Check the filter housing cavity for any debris that didn't come out with the filter.

3. 3

   Inspect the sump area for obstructions. With the filter removed, shine a flashlight into the sump opening and look for any foreign objects near the pump inlet — glass fragments, seeds, small bones, or plastic debris are common culprits. Use needle-nose pliers or tweezers to remove any visible obstruction. Never put fingers into the pump inlet without the machine unplugged.

4. 4

   Check the drain hose under the sink. Open the cabinet under the sink and trace the corrugated drain hose from the back of the dishwasher to where it connects to the sink drain or garbage disposal. Look for kinks or sharp bends. Confirm the hose has a proper high loop — the hose should rise as high as possible under the counter (ideally secured with a clip near the countertop) before dropping to the drain connection. A drooping hose allows backflow that prevents draining.

5. 5

   Check the garbage disposal connection if applicable. Run the disposal for 30 seconds to clear any food backup in the disposal inlet. If the disposal was recently replaced or installed, confirm the knockout plug was removed from the dishwasher drain port on the disposal body — this is a very common installation error that completely blocks drainage.

6. 6

   Check the air gap if one is installed on your sink or countertop. Remove the decorative cap and the inner cap of the air gap. Clean out any debris buildup inside. A clogged air gap restricts water flow through the drain hose.

7. 7

   Run a test cycle after cleaning. Reinstall both filters correctly, replace the lower rack, and run a short Quick Wash or Rinse & Hold cycle. Listen for the drain pump running at the end — it should run for 60–90 seconds with the sound of water flowing. If i20 does not return and the tub is dry at the end, the cleaning resolved the issue. If i20 returns, the drain pump itself may have failed and will need to be tested and replaced.

When to Call a Professional

Can You Still Use the Device?

Do not run additional cycles while i20 is active and water remains in the tub. Repeated drain attempts with a blocked pump can overheat the drain pump motor, turning a simple blockage into a motor replacement. Remove standing water manually, resolve the blockage, and run a test cycle before resuming normal use.