FixByModel
i40

Frigidaire i40: Clogged filter or sump restriction

The control sensed a drain restriction, typically a dirty filter or blocked sump that slows water leaving the tub. It is the same family of fault as i20.

DIY fix

By the FixByModel editorial team · Verified 2026-09 · Researched against manufacturer support & repair references (below)

Most likely causes

  1. Dirty or clogged filter and glass trap at the bottom of the tub
  2. Food or grease buildup in the sump
  3. Kinked or partly blocked drain hose
  4. Clog in the disposer or drain connection
  5. Failed or obstructed drain pump
Before you start — unplug the appliance and turn off the water supply. You'll be working near water and electrical parts, and drained water can be hot. If a step involves the pump, wiring, or opening the cabinet and you're unsure, stop and call a qualified technician.

Step-by-step fix

1Clean the filter and sumpLift out the filter assembly and glass trap, rinse them thoroughly, and clear any debris in the sump area.
2Check the drain hoseStraighten and clear the drain hose, keeping its high loop in place, and remove any clogs at the disposer.
3Reset the unitPress Cancel or cut power briefly to clear the code, then run a rinse cycle.
4Confirm drainingWatch that the tub empties fully at the end of the cycle.
5EscalateIf it recurs after cleaning, have the drain pump inspected.

Still showing i40?

If you’ve worked through every step and i40 keeps returning, an internal part likely needs testing and replacement. That’s a job for a qualified appliance technician, who can measure the suspect part against the service-manual spec before replacing it.

Which models this applies to

Frigidaire dishwashers. Frigidaire and Frigidaire Gallery dishwashers with i-series digital fault codes.

FAQ

What does Frigidaire i40 mean?

Clogged filter or sump restriction. The control sensed a drain restriction, typically a dirty filter or blocked sump that slows water leaving the tub. It is the same family of fault as i20.

What causes Frigidaire i40?

The most likely cause is dirty or clogged filter and glass trap at the bottom of the tub. Other causes include Food or grease buildup in the sump; Kinked or partly blocked drain hose; Clog in the disposer or drain connection; Failed or obstructed drain pump.

Can I fix Frigidaire i40 myself?

Usually yes. Start by working through the steps above, beginning with: lift out the filter assembly and glass trap, rinse them thoroughly, and clear any debris in the sump area.