D6 Error Patched — Viessmann

To do this, Alex performed a series of button presses on the boiler's control panel, which allowed him to access the boiler's configuration menu. After resetting the configuration, Alex restarted the boiler.

To avoid seeing the D6 error in the future, ensure your annual boiler service includes a check of the external weather compensation settings. Ask your engineer to verify that the sensor housing is watertight and that the entry points for the wiring are properly sealed with silicone to prevent moisture from traveling down the cable into the electronics. If you'd like to narrow down the cause, tell me: viessmann d6 error