Bosch ice maker shows E03 and stops cycling; ice mold may be overfilled or underfilled.

Safety: Unplug the appliance and close the water supply valve before working on the water system.

• Verify water supply: Make sure the saddle valve or shutoff valve supplying the refrigerator is fully open. Check that the household water pressure is at least 20–40 psi.
• Inspect water line: Pull the unit forward and inspect the plastic or copper water line for kinks, crushing, or freezing (in cold locations). Straighten or thaw as needed.
• Clean inlet screen: Remove the rear lower panel to access the Bosch water inlet valve. Turn off water, disconnect the inlet line, and inspect the small mesh screen for debris. Rinse it under running water and reinstall.
• Test valve coils: Disconnect the electrical connectors and measure coil resistance with a multimeter. Compare to Bosch specifications (typically 150–500 Ω). An open coil indicates a failed valve.
• Replace water inlet valve: If the valve is defective, label and disconnect all water lines and wiring. Remove mounting screws, install the new OEM Bosch dual inlet valve, and reconnect lines using new compression fittings or seals as required. Check for leaks after turning water back on.
• Run test cycle: Restore power and initiate an ice maker test/fill cycle (via service mode or manual test button if present) to confirm proper filling.