Display shows “Err 08” and no water flow is detected even when faucets are open

Safety: Shut off water and relieve pressure before removing the flow meter or valve connections.

Steps:

• 1. Verify plumbing: Confirm that the Sterling softener inlet and outlet are not reversed. Check the arrows on the valve body and flow meter.
• 2. Bleed air: With the unit in bypass, open several faucets to purge air from the lines. Then slowly return the softener to service and check for flow indication on the display.
• 3. Inspect flow meter orientation: Ensure the flow meter is installed in the correct direction and is not upside down or tilted excessively.
• 4. Check sensor connection: Remove the control cover and verify the flow sensor harness is fully seated on the board and at the sensor.
• 5. Replace sensor if needed: If plumbing is correct and no flow is registered despite water usage, replace the flow sensor/flow meter assembly.