E11 error and the brine draw stage does not start or stops prematurely

Safety first: Place the softener in bypass and disconnect power before opening the injector housing. Wear gloves and eye protection.

• Clean injector assembly: On the Nobel control valve, remove the injector cover (usually held by screws). Take out the injector nozzle, throat, and small screen. Soak them in warm water and vinegar if there is heavy scale. Use a soft brush or toothpick to clear all passages—do not enlarge the orifices.
• Inspect brine line and float: Remove the brine well cover inside the salt tank. Check that the safety float moves freely up and down and is not crusted with salt. Ensure the brine line connection at the float and at the valve is tight.
• Check for air leaks: Any loose push‑fit or compression fitting on the brine line can admit air and prevent vacuum. Reseat or replace fittings as needed.
• Test brine draw: With the unit out of bypass and power restored, start a manual regeneration and advance to brine draw. Mark the brine level in the tank and observe for 10–15 minutes. The level should drop steadily. If it does not, recheck for blockages or leaks.

If E11 continues after thorough cleaning and inspection, the internal brine valve or injector housing may be damaged and require replacement.