Bosch Tankless Water Heater: Enter the installer service menu (AU technical settings)
Enter the installer service menu (AU technical settings) on a Bosch tankless water heater: Installer-only service menu behind a password prompt; the password is printed in the installation manual (section 6.6).
Applies to: Greentherm T9800 SE 160/199 and T9900 SE 160/199 tankless water heaters
How to fix enter the installer service menu (au technical settings): step by step
- Open Information / Adjustments, touch until AU Technical Settings shows
- Touch the symbol and enter the password
- Touch up or down to move between menus
If the unit shows an error code, look it up: Bosch Tankless Water Heater codes
Models
Bosch Greentherm T9800 SE
Greentherm T9800 SE 160Greentherm T9800 SE 199Greentherm T9800 SEC 199
Bosch Greentherm T9900 SE
Greentherm T9900 i 199Greentherm T9900 SE 160Greentherm T9900 SE 199
Source: Bosch Greentherm T9800 SE 160-199 installation 6720816815 (06.2023), 6.6 Service menu - AU Technical Settings p.52; T9900 SE 160-199 installation 6 720 813 635 (2024-06) same section. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.