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Frigidaire Dishwasher Error Code i40

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026
⚠ Medium Severity 🔧 Easy DIY

Clogged filter or sump — restricted water circulation

The most common cause of the i40 error on a Frigidaire dishwasher is food-soil buildup in the glass trap / sump filter (~60% of cases); start with: clean the glass trap and filter.

💰 DIY cost: $0–$30 👨‍🔧 Pro cost: $100–$200 Save $100+ by doing it yourself
Frigidaire Dishwasher error code i40 on the display panel
How the i40 code appears on a Frigidaire dishwasher display

What Does Error Code i40 Mean on a Frigidaire Dishwasher?

Clogged filter or sump — restricted water circulation.

The control monitors water circulation during the wash cycle, typically inferring flow from turbidity feedback and expected pump load. When soils accumulate in the filter, glass trap, or sump enough to choke circulation, the board halts the cycle and shows i40. This is distinct from i20 (drain/blockage) and i50 (pump or motor faults): i40 points specifically at restricted flow from filtration debris rather than a failed drain path or electrical pump problem.

Models affected: Frigidaire dishwashers with self-cleaning or manual filter/glass-trap systems that use the i-series diagnostic codes; models such as the FFCD2418US, FGID2466QF, and FFBD2412SS can display this code
What owners report: Owners commonly report i40 appearing after several cycles without cleaning the filter, or after washing heavily soiled dishes with large food particles. A quick clean of the glass trap and filter often clears it; if it returns immediately, debris lodged in the sump outlet or impeller is the usual culprit.

What Causes Error Code i40?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Food-soil buildup in the glass trap / sump filter 60% of cases
  2. 2
    Debris blocking the sump outlet 25% of cases
  3. 3
    Wash pump impeller clogged with debris 15% of cases

How to Fix Frigidaire Dishwasher Error Code i40

🔧 Easy DIY Est. time: 10–20 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Clean the glass trap and filter

    Remove the bottom rack and clean the filter/glass trap assembly per the owner's guide.

  2. 2

    Clear the sump area

    Inspect and remove any food, labels, or debris from the sump.

  3. 3

    Re-run the unit

    Reinstall the filter and run a normal cycle to confirm the code clears.

How to Reset Error Code i40

Clean the filter and sump, then press Start/Cancel and restart a cycle.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full Frigidaire dishwasher reset guide → Enter diagnostic mode → Symptom guide: Dishwasher not cleaning well →

Did this guide fix your appliance?

When to Call a Professional

If i40 returns after cleaning, the wash pump impeller may be clogged and needs professional cleaning or replacement.

Average professional repair cost for this issue: $100–$200

Related Error Codes

i20
Drain problem — water not draining
⚠ High Severity
i50
Wash motor / circulation pump and heater assembly fault
⚠ High Severity

Same Code on Other Brands

Error code i40 appears on these other brands too.

Electrolux logo
Electrolux Dishwasher i20
Drain fault — clogged filter or blocked drain path

Find Replacement Parts

Use these links to find the exact replacement parts for your Frigidaire Dishwasher:

🔩
Search PartSelect
Frigidaire Dishwasher repair parts
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Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Frigidaire Dishwasher Error Codes

i30 Leak detected in base i10 Water supply problem — insufficient fill PF Power failure — cycle interrupted i60 Water heating failure — water not reaching target temperature iC0 Communication error — touchpad/control not talking to main board uo Vent open error — drying vent failed to close

Frequently Asked Questions

Can I keep using my Frigidaire Dishwasher when error i40 appears? +
You often can for a cycle or two, but the filtration issue behind i40 will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.
What most commonly causes i40 on a Frigidaire Dishwasher? +
Across reported Frigidaire dishwasher repairs, the most frequent is food-soil buildup in the glass trap / sump filter (60% of cases), debris blocking the sump outlet (25%), then wash pump impeller clogged with debris (15%). Check them in that order before replacing any parts.
i40 keeps coming back after a reset — what should I check next? +
A reset only clears the stored i40 fault; if it returns, the filtration problem is still present. Move on to the physical checks — clean the glass trap and filter, then clear the sump area — since the code will reappear until the root cause is resolved. This is a beginner-friendly job needing only basic hand tools.
How much does it cost to fix Frigidaire Dishwasher error i40? +
A DIY repair typically runs $0–$30 in parts, versus $100–$200 for a professional service call, so handling it yourself saves around $100. Expect the work to take about 10–20 minutes.
Which Frigidaire Dishwasher models show error i40? +
i40 is documented on Frigidaire dishwashers with self-cleaning or manual filter/glass-trap systems that use the i-series diagnostic codes; models such as the FFCD2418US, FGID2466QF, and FFBD2412SS can display this code. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: July 19, 2026.

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