What to check, in order
- Take out the filters
Turn the Cylinder Fine Filter counterclockwise and lift it out, then take the Coarse Filter out of the bottom of the tub.
- Rinse them
Empty the fine filter and rinse both under running water, then put them back.
- Clean the sump and glass trap
Clear any food soil from the sump area and, on models that have one, the glass trap.
- Check the drain hose
Make sure it isn't pinched or blocked.
- Run it again
If the code comes back, press Cancel or turn the power off at the breaker for 5 minutes, then try once more.
When to call an engineer
If it keeps coming back with clean filters, contact Frigidaire for service.
Good to know
- Frigidaire's help article calls the part to clean the glass trap; its 2021 manual describes a Cylinder Fine Filter and a Coarse Filter. Clean whichever your model has.
- Some Frigidaire dishwashers show E40 or EF0 for the same fault.
Parts people end up buying
Only if the checks above point to a part. Match it to your model number first: it's on a label on the edge of the door or the side of the tub.
- Dishwasher filterSearch on Amazon
Affiliate links: as an Amazon Associate I earn from qualifying purchases, at no extra cost to you. It never changes a verdict.
Quick answers
What does the Frigidaire i40 error code mean?
Food soil has built up in the filters or the sump. Frigidaire's manual puts iF0 in the same group.
Can I fix Frigidaire i40 myself?
Easy (about 15 minutes). Start with: take out the filters; rinse them; clean the sump and glass trap. If it keeps coming back with clean filters, contact Frigidaire for service.
Is Frigidaire i40 worth repairing?
Usually free. Cleaning the filters sorts it out.
Checked against
- Frigidaire: i40 on a dishwasher
- Frigidaire dishwasher use & care guide, 2021 (PDF, i codes)
- Frigidaire dishwasher use & care guide, 2023 (PDF, E codes)
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.