Biasi Boiler Fault Codes

922 fault codes across 46 Biasi boiler models — explained in plain English.

Italian manufacturer. Known for the Riva range in the UK.

922 fault codes
46 models documented
24 currently sold
22 legacy models

Biasi fault codes on this site

We document 922 fault codes across 46 Biasi models, covering 252 distinct codes. Biasi boilers use a mix of numbered codes and light or status indications. Codes for 25 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: Riva Compact HE M96.24SM/C, Riva Compact HE M96.28SM/C, Riva Plus M296.24SM, Riva Compact 24S (M90E.24S), Riva Compact 28S (M90E.28S), Parva 24S, Parva 28S, M96E, Activ A, Advance 25C, Antares Combi, Antares System, Basica Combi, Basica System 2022, Dina, Gaia, Garda M90f, Inovia 2020, Prisma, Rinnova Adaptive Combi, Riva Compact HE M96a, Concept 400 20 1 Mfs, Garda HE MK2, Advance Plus 16S 25S 30S, Advance Plus, Riva Compact HE MK2, Riva Plus HE, ActivA 18S, Advance Plus 30S ErP, Garda, Garda Plus HE, Riva Advance HE, Riva Plus HE 24C ErP, Riva Plus HE 28C ErP, Parva HE Combi, Parva HE System, Riva Compact, Advance Plus 16S, Advance Plus 30S, Advance 25S, Advance 30S, Advance Plus 25C, Advance Plus 30C, Advance Plus 35C, Advance 30C, Advance 35C.

Codes that appear on the most Biasi models:
Er 01 Er 02 Er 03 Er 10 Er 14 Er 04
Just want the most common Biasi problems?
The top 8 faults across the whole Biasi range — causes, DIY checks, repair costs.
Most serious

High-severity Biasi fault codes

1.21
Your boiler has registered a flue gas safety thermostat trip, meaning the safety device has detected an issue with the exhaust gases leaving the flue.
Riva Compact HE M96.24SM/C
 2.02
Your boiler has detected a safety-related issue with its internal sensors or temperature controls, causing it to lock out for safety.
Riva Compact HE M96.24SM/C
 2.91
Your Biasi boiler has detected an internal electronic or electrical detection fault, causing it to lock out for safety.
Riva Compact HE M96.24SM/C
 2.81
Your boiler has detected an issue with the air pressure or airflow sensor, which stops the boiler from safely igniting.
Riva Compact HE M96.24SM/C
 17
Your boiler has detected an internal electronic or parameter setting error and has stopped operating to protect itself.
Riva Compact HE M96.24SM/C
All models

46 Biasi boiler models

Riva Compact HE M96.24SM/C
Combi Discontinued
17 fault codes · 2004-2008
Riva Compact HE M96.28SM/C
Combi Discontinued
16 fault codes · 2004-2008
Riva Plus M296.24SM
CombiSystem Discontinued
1 fault codes · 2011 onwards
Riva Compact 24S (M90E.24S)
Combi Discontinued
24 fault codes · 2002 onwards
Riva Compact 28S (M90E.28S)
Combi Discontinued
0 fault codes · 2002 onwards
Parva 24S
Combi Discontinued
1 fault codes
Parva 28S
Combi Discontinued
13 fault codes · 2001 onwards
M96E
Combi Discontinued
12 fault codes · 2004-2008
Activ A
Combi Discontinued
31 fault codes · 2010 onwards
Advance 25C
Combi
19 fault codes · 2017-present
Antares Combi
Combi
74 fault codes · 2019-present
Antares System
System
96 fault codes · 2020-present
Basica Combi
Combi
39 fault codes · 2019-present
Basica System 2022
System
22 fault codes · 2022-present
Dina
Combi
22 fault codes · 2024-present
Gaia
Combi Discontinued
0 fault codes · 1997-2002
Garda M90f
Combi Discontinued
5 fault codes · 2002-2007
Inovia 2020
CombiSystem Discontinued
47 fault codes · 2012 onwards
Prisma
Combi Discontinued
10 fault codes · 1998-2002
Rinnova Adaptive Combi
CombiSystem
51 fault codes · 2021-present
Riva Compact HE M96a
Combi Discontinued
0 fault codes · 2008-2012
Concept 400 20 1 Mfs
Combi Discontinued
0 fault codes · 2010 onwards
Garda HE MK2
Combi Discontinued
7 fault codes
Advance Plus 16S 25S 30S
System Discontinued
23 fault codes · 2015 onwards
Advance Plus
Combi Discontinued
35 fault codes · 2015 onwards
Riva Compact HE MK2
System Discontinued
1 fault codes · 2010-2016
Riva Plus HE
System Discontinued
6 fault codes · 2011 onwards
ActivA 18S
System Discontinued
17 fault codes · 2009 onwards
Advance Plus 30S ErP
System
50 fault codes · 2015-present
Garda
Combi Discontinued
4 fault codes · 2003 onwards
Garda Plus HE
0 fault codes · 2004-present
Riva Advance HE
1 fault codes · 2004-present
Riva Plus HE 24C ErP
Combi
11 fault codes · 2015-present
Riva Plus HE 28C ErP
Combi
11 fault codes · 2015-present
Parva HE Combi
Combi
10 fault codes
Parva HE System
System
13 fault codes
Riva Compact
Combi
0 fault codes
Advance Plus 16S
23 fault codes
Advance Plus 30S
23 fault codes
Advance 25S
28 fault codes · 2017-present
Advance 30S
28 fault codes · 2017-present
Advance Plus 25C
Combi
25 fault codes · 2012-present
Advance Plus 30C
Combi
25 fault codes · 2012-present
Advance Plus 35C
Combi
25 fault codes · 2012-present
Advance 30C
Combi
28 fault codes · 2017-present
Advance 35C
Combi
28 fault codes · 2017-present
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