Viessmann Boiler: Acknowledged fault comes back
Acknowledged fault comes back on a Viessmann boiler: An acknowledged fault that is not fixed is shown again the next day at 07:00 and external fault signalling restarts.
Applies to: Vitodens 200-W B2HE 85, 120, 150, 199
Common causes of acknowledged fault comes back
- Fault not rectified
How to fix acknowledged fault comes back: step by step
- Open Message lists to see the fault history (10 most recent).
- Note the subscriber number of the faulty component (see rotary switch S1 on extensions).
- Rectify the cause; then clear the history if wanted.
If the unit shows an error code, look it up: Viessmann Boiler codes
Models
B2HE-85B2HE-120B2HE-150B2HE-199
Source: Viessmann Vitodens 200-W B2HE 85/120/150/199 Service Instructions 6167 813-24 (09/2026), p.60. 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.