Display shows “Err 03” and unit will not advance through regeneration steps

Safety: Disconnect power before removing the valve cover.

• Listen for motor operation: With the cover on, plug in the unit and start a manual regeneration. If you hear no motor noise, suspect a failed drive motor or no power to the motor.
• Inspect drive assembly: Remove the front/side cover of the Ecowater valve head. Check the main cam gear and smaller gears for broken teeth, misalignment, or foreign objects.
• Check motor wiring: Verify the motor connector is fully seated on the control board and at the motor. Look for burnt or loose pins.
• Test motor: With power disconnected, measure motor coil resistance. Compare to Ecowater service specs; an open circuit indicates a bad motor.
• Check position switch/encoder: Inspect the cam position switch or encoder disc for damage or misalignment. Ensure the switch actuates as the cam rotates.
• Reassemble and test: After clearing jams or replacing the motor/gear set, reassemble the valve head and run a full manual regeneration to confirm proper step advancement.