Display shows “Err 11” and unit indicates excessive water usage or leak alarm even when no taps are open

Safety: Ensure you know the location of the main shutoff valve before testing for leaks.

• Confirm no usage: Turn off all water-using appliances and taps. Check the Ecowater display for flow indication. If flow is shown, proceed to leak checks.
• Check for visible leaks: Inspect all downstream plumbing, toilets, and taps for drips. Repair any leaks found.
• Isolate softener: Put the Ecowater bypass into bypass mode. If the leak alarm stops, the leak is in the house plumbing. If it continues, suspect a sensor or control issue.
• Inspect flow sensor: Check the turbine and sensor wiring as described for Err 04. Electrical noise or a failing sensor can simulate low flow.
• Reprogram leak threshold: Some models allow adjusting leak detection sensitivity. Set according to the manual to avoid nuisance alarms.