What to check, in order
- New disposer? Check the knockout plug
If the drain hose goes into a food waste disposer, the knockout plug inside the disposer inlet must have been removed.
- Check the drain hose
It mustn't be blocked, pinched or restricted anywhere along its length.
- Check the hose height
The drain hose must reach at least 32 in (81 cm) above the floor.
- Clean the filters
Clear any food soil from the glass trap or filters, and from the sump area under them.
- Reset it
Press and hold Cancel, turn the power off at the breaker, or unplug the dishwasher for 3 minutes. Then run it again.
When to call an engineer
If it still won't drain with the hose and filters clear, contact Frigidaire for service.
Good to know
- Frigidaire's manual groups i20 with i40 and iF0: clogged filters or a restricted drain line.
- Some Frigidaire dishwashers show E20 for the same fault. Frigidaire's 2023 use & care guide gives it the same meaning.
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 i20 error code mean?
The dishwasher didn't drain completely.
Can I fix Frigidaire i20 myself?
Easy (about 30 minutes). Start with: new disposer? Check the knockout plug; check the drain hose; check the hose height. If it still won't drain with the hose and filters clear, contact Frigidaire for service.
Is Frigidaire i20 worth repairing?
Usually free. It's almost always the hose, the knockout plug or dirty filters.
Checked against
- Frigidaire: i20 on a dishwasher
- Frigidaire: dishwasher error codes and alarms guide
- Frigidaire dishwasher use & care guide, 2021 (PDF, i 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.