Viessmann Boiler Fault Codes

1,395 fault codes across 21 Viessmann boiler models — explained in plain English.

Premium German heating manufacturer. Known for high efficiency and build quality.

1,395 fault codes
21 models documented
11 currently sold
10 legacy models

Viessmann fault codes on this site

We document 1,395 fault codes across 21 Viessmann models, covering 489 distinct codes. Viessmann boilers use letter-and-number codes such as A2, A5, A9. Codes for 21 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: Vitodens 200-W, Vitodens 100-W, Vitodens 050-W, Vitodens 111-W, Vitodens 222-F, Vitodens 300-W, Vitodens 333-F, Vitopend 100, Vitorond 100, Vitola Biferral, Vitodens 100-W WB1B, Vitodens 100-W WB1A, Vitodens 050-W BPJD, Vitodens 025-W, Vitodens 100-W B1GA, Vitodens 200-W B2HF System, Vitodens 222-F B2TF, Vitodens 242-F FB2B, Vitodens 200-W B2KF Combi, Vitodens 242-F B2UA, Vitodens 100 Compact.

Codes that appear on the most Viessmann models:
30 38 10 18 50 51
Just want the most common Viessmann problems?
The top 8 faults across the whole Viessmann range — causes, DIY checks, repair costs.
Most serious

High-severity Viessmann fault codes

04
Your boiler has detected a sequence of ignition or flame detection errors and has shut itself down for safety.
Vitodens 200-W
 06
Your boiler has detected a sequence of ignition or flame detection errors and has shut itself down for safety.
Vitodens 200-W
 08
Your boiler has detected a sequence of ignition or flame detection errors and has shut itself down for safety.
Vitodens 200-W
 07
Your boiler has detected a sequence error or a flame signal where there shouldn't be one, causing the burner to shut down completely for safety.
Vitodens 200-W
 1A
Your boiler has shut down because it is struggling to discharge exhaust fumes safely or is detecting a significant lack of air flow.
Vitodens 200-W
All models

21 Viessmann boiler models

Vitodens 200-W
CombiSystem
39 fault codes · 2013 onwards
Vitodens 100-W
CombiSystem
37 fault codes · 2016-present
Vitodens 050-W
Combi
67 fault codes · 2014-present
Vitodens 111-W
Combi
37 fault codes · 2013-present
Vitodens 222-F
Combi Discontinued
92 fault codes · 2009-2016
Vitodens 300-W
Combi
22 fault codes · 2010-present
Vitodens 333-F
Combi
39 fault codes · 2006-present
Vitopend 100
Combi Discontinued
17 fault codes · 1994-2010
Vitorond 100
Regular Discontinued
8 fault codes
Vitola Biferral
Regular Discontinued
3 fault codes · 1980-2005
Vitodens 100-W WB1B
CombiSystem Discontinued
24 fault codes · 2008-2013
Vitodens 100-W WB1A
Regular Discontinued
210 fault codes · 2007-2011
Vitodens 050-W BPJD
Combi Discontinued
25 fault codes · 2014-2016
Vitodens 025-W
Combi
23 fault codes · 2024-present
Vitodens 100-W B1GA
Regular
105 fault codes · 2021-present
Vitodens 200-W B2HF System
System
141 fault codes · 2020-present
Vitodens 222-F B2TF
Combi
202 fault codes · 2020-present
Vitodens 242-F FB2B
Combi Discontinued
89 fault codes · 2008-2012
Vitodens 200-W B2KF Combi
Combi
140 fault codes · 2020-present
Vitodens 242-F B2UA
System Discontinued
56 fault codes
Vitodens 100 Compact
Discontinued
19 fault codes
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