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FRIGIDAIRE i20

Frigidaire Dishwasher Error i20: Dishwasher Did Not Drain Properly

Clear meaning, realistic next steps, and safe guidance without turning the page into a long repair manual.

What it means

Frigidaire dishwasher error i20 usually means the machine did not drain water from the tub within the expected time.

Severity

Medium - some user checks may help, but repeated faults often need service.

Can you fix it yourself?

Partial — start with DIY steps

Most likely cause

Drain filter and sump screen clogged with food debris — the most frequent cause on Frigidaire and Electrolux dishwashers

Estimated time for safe first checks: 15–30 min for filter and hose checks; professional if pump has failed.

Step-by-Step DIY Fix Guide

  1. SAFETY: Turn off power at the breaker before reaching into the sump or drain path.
  2. Remove the lower rack, take out the filter assembly, and rinse the filter and trap thoroughly.
  3. Check the drain hose under the sink and make sure it is not kinked or pinched.
  4. Confirm the hose has a proper high loop or air-gap path and that the garbage disposal inlet is open if one is installed.
  5. Restore power and run a cancel or drain cycle to confirm whether i20 clears.

If i20 comes back after the first checks

  • If standing water remains, listen for the drain pump and watch for weak water movement.
  • If the hose and routing are correct, the pump path may still be blocked deeper in the machine.
  • If the code appeared after recent plumbing work, recheck the disposer inlet and hose routing before assuming pump failure.

What This Error Means

Frigidaire dishwasher error i20 means the machine attempted to drain but could not clear water from the tub in time. In most kitchens the first fix is still in the filter, hose, or drain-routing path rather than inside the electronics.

The best first checks are the filter assembly, the drain hose routing under the sink, and the garbage disposal connection if one is installed. A missing high loop or disposal knockout problem can trigger i20 just as easily as a clogged filter.

If the filter and hose path are correct, the next likely issue is the drain pump or a deeper blockage in the drain path.

Most Likely Cause by Symptom

Standing water is still in the tub after the cycle ends.

Likely cause: The filter, hose, or drain path is restricted.

Check first: Clean the filter first, then inspect the hose routing and sink-side connection.

The dishwasher tries to drain but the water level changes very slowly.

Likely cause: The pump is pushing against a blockage or poor hose routing.

Check first: Check the high loop, disposal inlet, and hose path before assuming pump failure.

Common Causes

  • The filter or sump screen is clogged with food debris.
  • The drain hose is kinked or pinched.
  • The hose routing is too low and water is siphoning back into the tub.
  • The garbage disposal knockout plug was never removed.
  • The drain pump is clogged or failing.

What Not to Do

  • Do not keep running full cycles with standing water still in the tub.
  • Do not assume the pump has failed before checking filter, hose, and routing first.

Model and Display Variation Notes

Model-family notes

  • Frigidaire dishwasher filter and trap layouts vary by model family, but the tub-floor filter path is still the first place to start.
  • Kitchen plumbing changes are especially relevant on i20 because hose routing and disposal setup matter as much as the dishwasher itself.

Display and panel differences

  • Panel wording can vary by series, so confirm the exact code pattern before buying parts.

Parts, Tools and Service Options

Common parts

  • Drain pump assembly ($40–$90)
  • Drain hose if kinked or cracked ($10–$25)
  • Filter assembly if the mesh is torn ($15–$35)

Manual and model check

Check your exact model before ordering any dishwasher parts.

Service option

Service visit if the code returns after the accessible filter and drain checks are complete.

Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.

When Not to Keep Troubleshooting

i20 returns after the filter, hose routing, and disposal connection are checked.

  • The drain pump runs but water still remains in the tub.
  • You suspect a blocked or failed drain pump that is not safely accessible.

How to Prevent It Recurring

  • Clean the drain filter every four weeks — food and grease accumulation in the sump is the leading cause of i20 on Frigidaire and Electrolux dishwashers
  • Run the garbage disposer before starting the dishwasher if they share a drain connection

Related Error Codes

Extra notes

  • This page is based on Frigidaire support material and stays conservative where model-specific guidance may vary.
  • The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.

Source and model notes

Last reviewed: 2026-04-09

Based on: Based on Frigidaire dishwasher drain-fault guidance and edited to prioritize filter cleaning, hose routing, and sink-side drain checks before pump replacement.

View Frigidaire US Official Support

Model coverage note: Filter, trap, and drain-path layouts vary by Frigidaire dishwasher family, so use this page as a practical first-pass guide rather than a model-specific repair procedure.

Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.

Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.