Frigidaire Dishwasher I20 Error Code: Meaning, Causes & Fix
Drain error — the dishwasher is draining too slowly or not at all (i20 family; iF0/iE0 siblings cover related drain/filter states by model).
i20 means the drain phase timed out: water is leaving too slowly or not at all. Frigidaire's drain chain is filter → sump → pump → hose → air gap/sink, and the blockage lives in it — the filter and the air gap/sink connection are the statistical leaders, the pump the finisher. Frigidaire's owner's guide is unusually direct about what i20 means, and it groups three displays together: i20, i40, and iF0 all report that clogged filters or a restricted drain line have been detected. Its prescribed checks are specific - clean both filters and the sump area, check for a pinched or blocked drain hose, and, if the drain line is attached to a disposer, check that the knockout plug has been removed. It follows that i20 names a restriction, not a failed part: the pump is only suspected once the path it pushes against is proven clear. The guide's general reset for error codes - pressing Cancel, or switching power off at the breaker for 5 minutes - clears the display and lets the unit restart; it does nothing to the restriction itself, which is why a returning code means walking the drain path in order, from filter to sink.
What causes the i20 code on a Frigidaire dishwasher?
Clogged filter
The leading cause — a greasy filter throttles everything.
Air gap / sink connection blockage
Food plugs at the outlet path.
Pump jam or failure
Debris or an open motor.
Kinked hose
Post-install classic.
Debris collected in the sump and glass trap
Frigidaire's sump design puts a glass trap in the drain's first chamber, there to catch the shard, bone, or olive stone that would otherwise jam the pump. Between the trap and the fine filter, debris degrades drainage gradually rather than suddenly: the filters mat with grease while the trap slowly fills, the drain phase takes longer week by week, and the dishwasher may sound different at drain time long before i20 finally appears. Frigidaire's guide lists cleaning both filters and the sump as one job.
High loop slipped down, so the machine drains twice
The drain hose must rise into a high loop under the counter before it falls to the sink connection; that loop is what stops drained water flowing back towards the tub. If the loop's securing strap or clip breaks and the hose sags, water the pump has just expelled can siphon or run back into the sump, so the next drain phase starts with water that was already removed once. The machine is effectively draining the same water twice, until the drain phase times out into i20.
Air gap clogged, or a part-left knockout at the disposal
Where local code fits an air gap - the small device on the sink deck - the drain path runs up through it, and its cap and outlet clog with food film until the gap itself becomes the restriction. The disposer version is similar: Frigidaire's guide singles out the knockout plug, and a plug that was knocked out carelessly can leave a fragment or a partly opened inlet that passes some water but not a full drain flow. Both fit i20 that began after sink or disposal work.
Checks to run before you replace anything
- Clean the filter; clear the air gap; check hose run; pump listen test on cancel/drain.
- Start with a timed cancel/drain before opening anything: with the door latched, run Cancel and listen - a healthy Frigidaire empties its sump decisively and goes quiet, while a restricted one trails off, gurgles, or is still holding water when the drain phase ends. Do not pull the filter out while the tub still holds undrained water; let the cancel attempt finish first so debris in that water is not washed down into the exposed pump.
- Take the bottom rack out for room, then lift out the filter assembly and the glass trap and wash both thoroughly; with them out, inspect the sump itself for shards, labels, and food sludge, and spin the lower spray arm by hand to confirm nothing hangs down into the sump area where it can foul the drain path.
- Move under the sink and work the path in order: confirm the drain hose still rises into its high loop and is strapped up under the counter, not sagging; if an air gap is fitted, take its cover and cap off and clear them; if the hose connects to a disposer, confirm the knockout plug is fully removed from the inlet and run the disposer to clear it.
- Only with the path proven clear, test the pump itself: power off, reach the pump impeller through the sump and check it turns and is free of glass or bone fragments, then - if you meter pumps - check the pump motor for continuity; an open reading means a failed pump rather than a restriction.
Frigidaire dishwasher i20 error code fix
- Clean/clear the path; clear pump debris or replace a dead pump (continuity test).
- Wash the filter assembly and glass trap, clear the sump, and refit everything fully seated: a filter or trap left slightly unseated lets debris straight through to the pump and turns a restriction fault into a pump fault.
- Re-secure the drain hose's high loop up under the counter, replacing a broken strap or clip, and check the hose run for pinches where it passes through the cabinet - Frigidaire's guide names a pinched hose alongside the filters in its i20 checks.
- Clear the air gap (cap, outlets, and the hose down to the drain) or fully remove the disposer's knockout plug, retrieving any fragment from inside the disposer with the power off; then run the disposer before reconnecting and retesting.
- Free the pump impeller of any debris you find; if the impeller is damaged, or the pump tests open-circuit, replace the drain pump. Confirm the repair with a cancel/drain that empties decisively, then one full empty cycle, before calling i20 fixed.
The part that usually fails: Drain pump
Continuity test; open = replace.
Frigidaire dishwasher error code 20 reset
Cancel/drain after clearing; i20 clears on a normal empty.
Frigidaire's i-series codes clear with a power reset: switch the breaker off for at least 5 minutes, restore power, and run a cycle. Leak code i30 is the exception in practice — it will not stay cleared while water remains in the base pan, because the float switch is still physically lifted.
Why does the i20 code keep coming back?
Quick recurrence = downstream restriction or weakening pump.
How to stop i20 coming back
- Clogged filter: The leading cause — a greasy filter throttles everything.
- Air gap / sink connection blockage: Food plugs at the outlet path.
- Pump jam or failure: Debris or an open motor.
Retrieving stored fault codes on Frigidaire dishwashers
Frigidaire dishwashers include a diagnostic/water test cycle (entered by holding specific pad combinations — on many Gallery models, holding Power Scrub/Start combinations; the service data sheet behind the toe-kick gives the exact pair) that fills, washes, heats and drains in a compressed sequence and shows any i-code that the control logs.
Other Frigidaire dishwasher error codes
| Code | Meaning | First fix |
|---|---|---|
| CL | Close dishwasher door prompt (rendering used on GLD/FDB-series manuals; same instruction as Cd on other models) | Close the dishwasher door and latch it fully; ensuring the door is properly latched clears the display and no service is needed |
| Cd | Close dishwasher door prompt (rendering used on FGHD-series manuals; same instruction as CL on other models) | Close the dishwasher door and latch it fully; the status lights flash to show cycle status until it is latched |
| E20 | Platform-rendering variant of the drain fault on some Frigidaire/Electrolux platforms (E20 = drain system in those charts) — the i20 playbook applies. | Clean/clear the chain; service or replace the pump as found. |
| E30 | Platform-rendering variant in the drain family on some Frigidaire/Electrolux platforms (E30-style codes appear in the drain/leak monitoring area by platform); diagnose with the i20/i30 playbooks by symptom. | Drain branch: clean filter, clear path, service pump. Flood branch: dry base, find and fix the leak. |
| ER | 'Er' on a Frigidaire dishwasher display = a keypad/control error state (Er followed by a key code on many models indicates a stuck/shorted key or control fault). | Dry-out first; reseat the panel ribbon (power off) if it persists. |
| HO | Water heat delay; the display flashes while the cycle waits for the water to heat | No action is needed; washing continues automatically once the water reaches temperature |
| Hd | Water heat delay (older-model rendering of HO) | No action is needed; washing continues automatically once the water reaches temperature |
| LO | Rinse aid dispenser is low and needs to be refilled | Refill the rinse aid dispenser; the indication stays through up to 5 cycles or until the reservoir is filled |
| PF | Power failure notice; appears when the dishwasher is first installed or when power has been interrupted | Touch the START/CANCEL pad to clear it; on newer models press Start within 18 hours of a hard failure to resume at the interruption point |
| UO | Vent open error — the dishwasher's vent (drying vent) is reporting open/not operating correctly during the heated dry phase. | Clean the vent passage; replace the vent assembly if its motor is dead; repair door-harness damage if found. |
| i10 | Fill error — the dishwasher is not filling with water in the expected time (low/no water inlet). | Free the float; restore supply; clean screen; replace a dead valve. |
| i30 | Leak/flood error — water detected in the base (anti-flood system active); the dishwasher may drain continuously. | Repair the leak found; correct detergent if suds were the cause. |
| i40 | Clogged filters or a restricted drain line has been detected (grouped with i20 and iF0) | Check and clean both filters and the sump area and check for a pinched or blocked drain hose; if the drain line is attached to a disposer, check that the knockout plug has been removed |
| i60 | A problem has been detected with the water heating system | Press the cancel button or turn power off at the breaker for 5 minutes and restart; if this does not resolve the problem, service will need to be called |
See the full list on the Frigidaire Dishwasher error codes hub.
Codes i20 gets confused with
E30 — Platform-rendering variant in the drain family on some Frigidaire/Electrolux platforms (E30-style codes appear in the drain/leak monitoring area by platform); diagnose with the i20/i30 playbooks by symptom. Frigidaire's mainline codes are the i-series (i10/i20/i30), but sibling Electrolux-platform machines and some Frigidaire generations render related faults in E-format.
E20 — Platform-rendering variant of the drain fault on some Frigidaire/Electrolux platforms (E20 = drain system in those charts) — the i20 playbook applies. In E-format platform charts, E20 is the drain fault: the machine isn't emptying in time.
i30 — Leak/flood error — water detected in the base (anti-flood system active); the dishwasher may drain continuously. i30 is Frigidaire's (Electrolux-platform) flood code: the base float/ sensor found water, so the machine stops filling, often runs the drain pump continuously, and refuses cycles.
UO — Vent open error — the dishwasher's vent (drying vent) is reporting open/not operating correctly during the heated dry phase. UO is a Frigidaire-specific code for the vent system: many Frigidaire dishwashers use a vent with a small fan/wax-motor damper that opens for drying.
Frequently asked questions
i20 vs i30?
i20 = drain fault (water won't leave). i30 = flood fault (water in the base). Different systems, similar first moves (look in the sump/base).
Are i20, i40, and iF0 the same fault on a Frigidaire dishwasher?
Frigidaire's owner's guide treats them as one detection: all three are listed together as clogged filters or a restricted drain line having been detected, with the same checks - clean both filters and the sump area, check for a pinched or blocked drain hose, and check the disposer knockout plug if the line is attached to a disposer. Which of the three your model displays is a model difference; the work is identical.
Does turning the power off at the breaker for 5 minutes fix i20?
It clears the code, not the cause. Frigidaire's guide says that for error codes generally, pressing Cancel or turning power off at the breaker for 5 minutes should clear the display and let the unit be restarted - and that if that does not resolve the problem, service is needed. If i20 comes straight back, the restriction the code reported is still in the drain path, and resetting it again will not change that.
Why did i20 appear right after a new garbage disposal was installed?
This is the cause Frigidaire itself prints in the guide: if the drain line is attached to a disposer, check that the knockout plug has been removed. A new disposer ships with its dishwasher inlet sealed by that plug; if the installer connected the hose without knocking it out - or knocked it out only partly - the dishwasher has nowhere to drain. The fix is at the disposer inlet, with its power off, not inside the dishwasher.
How to fix frigidaire dishwasher error code i20?
Start here: Clean/clear the path; clear pump debris or replace a dead pump (continuity test). Wash the filter assembly and glass trap, clear the sump, and refit everything fully seated: a filter or trap left slightly unseated lets debris straight through to the pump and turns a restriction fault into a pump fault.
Related guides
Facts on this page were checked against manufacturer documentation: manuals.plus · manuals.plus · manualsfile.com · www.manualshelf.com · www.manualshelf.com · www.manualshelf.com