Contact support
When myCistern support is appropriate and what information helps
WaterGuard RefillWaterGuard LevelRoth Smart SteuerungGraf BlueLevel R
If the diagnosis does not clearly resolve the problem, this is a good point to contact myCistern support. Examples include:
- The water height remains implausible despite a correct sensor position and offset.
- The device belongs to an unreachable previous owner.
- An internal system or file-system error is shown.
- You suspect an electrical defect.
- A certified valve does not work despite correct configuration.
- A software update repeatedly fails.
- The problem continues after completing the appropriate diagnostic path.
Have the model, serial number and a precise description of the problem ready. Photos or screenshots are optional and can help with the assessment. You can reach support by email at support@mycistern.com or by phone at +49 871 14215080, Monday to Friday from 9:00 to 17:00.

