Vaillant vSMART Non‑Volatile Memory Failure or Cloud Sync Issue

vSMART loses all schedules and settings after a power cut or reboot.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Corrupted configuration storage in gateway, failure to sync with Vaillant cloud, factory reset triggered unintentionally, outdated firmware

Steps to protect settings:

Check for resets: Ensure no one is pressing reset buttons on the gateway or thermostat during power events.
Update firmware: Install the latest firmware, which may fix memory handling issues.
Cloud backup: Confirm that your vSMART account is properly linked so schedules are stored in the cloud and can be restored.
Stable power: Use a surge protector or UPS for the gateway if power cuts are frequent.

If settings continue to be lost, the gateway's memory may be defective and the unit should be replaced.

Medium 3/5

vSMART Internet Gateway

Check Price on Amazon

We may earn a commission from links on this page.