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Source-backed error-code guide

Reviewed

Frigidaire Dishwasher i20 Error Code

Frigidaire says i20 indicates the dishwasher is not draining properly and points to external drain setup, hose, disposer, and filter checks.

Applies to Frigidaire dishwasher

What the appliance detected

Detected condition

The dishwasher did not drain completely or is not draining properly.

What may contribute

Possible causes

  • The disposer knockout plug may not have been removed on new disposer installations.
  • The drain hose may be blocked, pinched, restricted, or at the wrong height.
  • The glass trap or filter may contain food soils.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Record the display and model

    • Photograph or write down the exact code or message before clearing it.
    • Confirm the full model number and Frigidaire owner manual before taking model-specific action.

  2. Use only documented external checks

    • Confirm the disposer knockout plug has been removed if the dishwasher drains through a disposer.
    • Check the visible drain hose for blockage, pinching, restriction, and the documented minimum height.
    • Clear the glass trap or filter if the manual identifies it as user-accessible.

  3. Stop before internal work

    • If the code remains after documented checks, request support or service.
    • Do not remove panels, bypass latches, or access wiring, pumps, heaters, controls, or internal components.

Actions not recommended

  • Do not reach into wet areas while power is connected.
  • Do not open electrical, pump, heater, latch, or control areas.
  • Do not replace parts based only on the displayed code or message.

When to stop and request service

  • i20 returns after accessible drain and filter checks.
  • Standing water cannot be addressed safely.
  • Pump, wiring, or internal drain diagnosis would be needed.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: August 17, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Frigidaire.

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