What the appliance detected
Detected condition
The dishwasher reports a clogged filter or sump condition.
What may contribute
Possible causes
- Food soils may have built up in the sump.
- The glass trap or filter may need cleaning.
Start conservatively
Safe preliminary checks
Work in order and stop whenever a step is not supported by the documentation for your model.
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.
Use only documented external checks
- Clean the glass trap and filter if the owner manual identifies them as user-accessible.
- Rerun the dishwasher after the accessible filter area is clear.
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
- i40 continues after user-accessible filter cleaning.
- The sump area cannot be cleaned safely.
- Internal pump, sensor, wiring, or control 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.
Frigidaire Owner Support
Dishwasher Error Codes and Alarms GuideFrigidaire Owner Support
Dishwasher Error Code i40 - Clogged filter or sump
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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