Maytag Dishwasher Error Code F4 E3 — Turbidity Sensor Fault
What this means
The F4 E3 error code indicates the Optical Water Indicator (OWI) turbidity sensor is not functioning properly. This sensor measures the amount of soil and debris in the wash water to determine how long and how intensely to wash. A failed sensor may cause the dishwasher to run excessively long cycles or to stop mid-cycle.
Alternate codes: F4E3
Step-by-step fix
4 stepsReset the dishwasher
Turn off the circuit breaker for 1 minute, then restore power. Start a new cycle to see if the error was a one-time glitch.
A temporary sensor reading can trigger this error during unusually dirty loads.
Clean the sensor
Locate the turbidity sensor in the dishwasher sump (under the lower filter). Remove the filter assembly and gently clean the sensor lens with a soft, damp cloth.
Grease and food film on the sensor lens cause false readings.
Check sensor wiring
Inspect the wire connection from the turbidity sensor to the main control board. Ensure the plug is firmly seated.
Moisture in the connector can cause intermittent sensor failures.
Replace the turbidity sensor
If cleaning and checking connections does not resolve the issue, replace the OWI sensor. It typically snaps into the sump housing.
Order the correct sensor for your specific model number.
When to call a professional
If replacing the sensor does not clear the error, the main control board may need replacement, which should be handled by a professional.
Related error codes
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.
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