Softener does not start regeneration at the expected time (time-based model)

Safety: No special safety measures beyond normal electrical caution.

Steps:

• Verify current time: Check and correct the time of day on the Vaillant control.
• Check regeneration time: Ensure the regeneration start time is enabled and set to a suitable off‑peak hour.
• Review modes: Confirm the unit is not in holiday, manual‑only, or service lockout mode.
• Monitor: After correcting settings, wait for the next scheduled time or trigger a manual regeneration to confirm operation.