GE ice maker displays F3 and may not sense bin full or may stop making ice prematurely.

Safety first: Turn off the ice maker before working around the bin area.

• Identify sensor type: Some GE models use an optical emitter/receiver pair; others use a mechanical shutoff arm with a switch.
• Clean optical lenses: For optical sensors, gently clean the emitter and receiver windows with a soft cloth and mild soap solution to remove frost or film.
• Check bin arm movement: For mechanical arms, move the arm up and down. It should move freely and click the internal switch. If it binds, clear any ice or debris.
• Inspect wiring: Ensure the sensor harness is intact and firmly connected at both the sensor and control board.
• Replace sensor assembly: If cleaning and alignment do not resolve F3, replace the bin full sensor or shutoff arm switch assembly with a GE-approved part.