Display shows “Err 08” and the unit reports abnormal flow when no water is being used, or fails to detect flow when water is running.

Safety first: Disconnect power before changing wiring or meter settings.

Verify no leaks:

• Ensure all faucets and fixtures are closed. Check for hidden leaks (running toilets, dripping faucets) that could cause real flow.
• If flow is truly zero but the display shows flow, suspect a sensor or calibration issue.

Check meter settings:

• Enter the controller’s setup menu and verify the meter size and type match the installed Kinetico valve (consult the model label and manual).
• Correct any mismatched settings and save.

Inspect sensor and wiring:

• Locate the flow sensor/turbine wiring harness and inspect for damage, splices, or routing near high-voltage lines that could induce noise.
• Reroute the cable away from power lines if possible and ensure all connectors are tight.

Test:

• Restore power and observe the flow reading with no water use. It should read zero.
• Open a faucet and confirm that the flow reading responds appropriately.
• If Err 08 persists, replace the flow sensor/turbine assembly.