Dishwasher displays i40 and may stop shortly after starting a cycle.

Safety First: Disconnect power at the breaker before accessing internal components.

• Access pressure sensor: Remove the toe-kick panel and, if necessary, the side panel to locate the pressure sensor mounted near the sump with a small rubber or plastic hose attached.
• Inspect and clean hose: Remove the hose from both ends. Blow through it to check for blockage. Rinse with hot water to clear grease or debris, then reinstall securely without kinks.
• Check sensor connections: Verify the electrical connector on the pressure sensor is fully seated and free of corrosion or moisture. Reseat the connector.
• Test operation: Restore power and run a short cycle. If the i40 code clears, the blockage was likely the cause.
• Replace sensor if needed: If the error returns, the pressure sensor may be defective. Replace it with a Frigidaire Professional-compatible water level/pressure sensor.
• When to call a technician: If a new sensor does not resolve the issue, the main control board may be faulty and should be tested and replaced by a professional.