Frigidaire Dishwasher Error Code i40 — Wash Pump Circuit Fault
What this means
The i40 error on Frigidaire dishwashers indicates an issue with the wash circulation pump circuit. The control board detects that the pump is drawing too much or too little current, or is not starting at all. This can be caused by a seized pump motor, a jammed impeller, a wiring fault, or a failed control board relay.
Alternate codes: I40
Step-by-step fix
4 stepsCheck for pump obstructions
Open the dishwasher and remove the lower spray arm and the pump cover/filter assembly. Check the wash pump impeller area for glass, bones, toothpicks, or other debris that could jam the pump.
Always scrape dishes before loading to prevent hard debris from reaching the pump.
Test the wash pump motor
Disconnect power. Access the wash pump from underneath the dishwasher. Disconnect the motor wires and test for continuity. Try spinning the motor shaft by hand — it should rotate freely.
If the motor hums but does not turn, the bearings may be seized.
Check the wiring
Inspect the wire harness from the control board to the wash pump. Look for burnt, loose, or corroded connectors. Reseat all connections.
Water leaks onto the connector can cause corrosion that increases circuit resistance.
Replace the pump or control board
If the pump motor fails testing, replace the wash motor assembly. If the pump is fine, the control board relay may be faulty and the board needs replacement.
The wash motor is the most expensive component — verify it has actually failed before replacing.
When to call a professional
If you cannot determine whether the pump or control board is at fault, professional diagnosis can save you from replacing the wrong part.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Wash Motor Pump Assembly
Part #154844301 · $60–$120
If motor fails continuity or bearings are seized
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