Frigidaire dishwasher i40: clogged filter or sump
Frigidaire identifies i40 as a clogged filter or sump condition and directs owners to clean the glass trap/filter and rerun the dishwasher before service.
What this guide covers
Error codes: i40, I40
This guide follows a structured decision tree built from manufacturer troubleshooting information. It does not assume that the most commonly replaced part is the failed part, and it does not show an exact-fit replacement part unless model compatibility has been independently verified.
Continue this exact diagnostic
Safe troubleshooting sequence
This reviewed path begins with a direct owner-safe action or status check rather than a branching question. Follow the step below, then use the interactive diagnostic if the condition persists.
- Turn the dishwasher off and let hot water coolUse caution for broken glass.
- Clean the filter/glass trap according to the model guideRemove food soil without forcing non-removable parts.
- Reassemble and rerun the dishwasherIf i40 returns, continue to service.
Reviewed outcomes
Clean the owner-accessible filter and glass trap
Food soil in the sump/filter is Frigidaire’s documented i40 cause.
Evidence strength: Strong
i40 persists after the filter/sump area is clean
The owner-maintenance cause has been addressed, so further diagnosis is appropriate.
Evidence strength: Strong
When professional diagnosis is the safer next step
The owner-maintenance cause has been addressed, so further diagnosis is appropriate.
Appliance Verdict stops before energized electrical testing, gas-system work, sealed-system work, and other checks that can create unnecessary risk. A technician can use the model, issue, and completed checks from the interactive diagnostic as a starting point.
Repair or replace?
A diagnosis and a repair decision are different questions. Once you have a real repair quote, compare the total repair cost with the all-in price of a comparable replacement. Warranty or protection-plan coverage, appliance age, reliability history, efficiency, and likely future repairs can all matter. Appliance Verdict’s interactive result includes a transparent cost comparison rather than a black-box replacement recommendation.
Manufacturer sources
Dataset reviewed through 2026-09-11. Appliance Verdict is independent and is not endorsed by the manufacturers cited. Always follow the exact owner or service documentation for your model.
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