What to check first
Stop normal operation while this warning is active. Follow only the documented safe checks or protective-drain instructions for the exact model.
Basic checks
- Stop the dishwasher, isolate power at a safe dry point and let hot water cool before owner-permitted glass-trap or filter care. Do not reach into standing water or hidden sump openings.
- Clean and refit only the glass trap and filter that the exact model manual permits the owner to remove. Use protection against possible sharp glass; stop if access or correct refitting is uncertain.
Applicability
Broad appliance guidance · Frigidaire dishwashers
Frigidaire presents this guidance for dishwashers generally; confirm the exact model guide because filter construction, access, and cycle controls can vary.
Reset or retry steps
- Frigidaire directs glass-trap/filter cleaning and then rerunning the unit. It does not specify an empty rinse or short programme. Follow the exact model controls only after safe care and refitting, with no leak or electrical warning.
- FaultCodeLab limits this to one monitored rerun; stop and contact service if i40 or incomplete drainage returns. Do not transfer the separate i20 breaker/unplug reset to i40.
When to call a technician
- Contact service if i40 returns after the glass trap and filter are cleaned as the model guide describes.
- Stop and arrange service immediately if water leaks, an electrical odor appears, or broken glass prevents safe filter access.
Before approving a paid visit, check warranty status and reviewquestions to ask before repair.
Can I keep using it?
Stop normal use when water is visible or a leak warning is active. Stay clear if water could reach wiring or controls.
- Safe next step
- Follow the code-specific shutdown or protective-drain instructions, turn off water when appropriate, and avoid repeated resets. Do not interrupt a documented protective-drain sequence just to clear the display.
- Stop when
- Water is near wiring, cabinetry is getting wet, the leak returns, or the source is not safely visible.
Do not keep using the appliance if the code points to voltage, wiring, control power, burning smell, smoke, or a possible miswired supply.
- Safe next step
- Use only safe owner-level power checks, then involve a qualified technician or electrician when the source points to wiring or supply voltage.
- Stop when
- Breakers trip, lights dim, the appliance smells hot, wiring may be miswired, or the warning returns after a safe reset.
Safety boundaries
Safe first
- Match the exact brand, appliance type, and displayed code first.
- Use the model manual as the final authority for access steps.
- Stop and address visible water before retrying the appliance.
- Disconnect power before any service-access step.
Do not do this
- Do not continue normal cycles while this code is active; any protective-drain sequence must follow the exact model instructions.
- Do not open drain or pump areas while the appliance is powered.
- Do not bypass locks, float switches, leak sensors, or other safety systems.
Common causes include
- Food soils built up in the dishwasher sump
- Glass trap or filter clogged with food debris
FAQ
What does Frigidaire Dishwasher code i40 usually mean?
This code commonly appears when food soils clog the dishwasher filter or sump. Model context matters: Frigidaire presents i40 with a lowercase-style leading letter; I40 is the same case-insensitive lookup, not a separate fault.
Can I keep using the dishwasher with code i40?
Stop normal operation until the issue and safety warnings have been addressed. Follow only the documented safe checks or protective-drain instructions for your model. Switch off dishwasher power before reaching into the filter area.
When should I call a technician for Frigidaire i40?
Contact service if i40 returns after the glass trap and filter are cleaned as the model guide describes. A qualified technician may check the listed symptoms and source guidance against the model's service information before treating any part as failed.