How to Fix / Troubleshooting

Safety first: Turn off water and power. Depressurise the system before opening the valve head.

Check for mixing: Test hardness at a tap downstream of the softener. If water is partially hard when it should be soft, internal bypass may be occurring.
Inspect valve internals: Remove the control head cover and follow the service instructions to access the rotor/rotor disc and seal pack.
Examine seals and rotor: Look for cuts, flattening, or debris on the seals. Inspect the rotor for cracks or wear marks.
Clean sealing surfaces: Wipe the valve body bore and rotor surfaces with a clean, lint-free cloth. Do not use abrasive materials.
Replace damaged parts: Install a new Aqua Dial seal kit and rotor disc if any damage is found.
Reassemble carefully: Ensure the rotor is correctly aligned with the cam and that all screws are tightened evenly.

E13 displayed and the unit reports an internal leak or valve position error

Possible Causes