Ferroli Boiler Fault Codes

687 fault codes across 39 Ferroli boiler models — explained in plain English.

Italian heating manufacturer with a strong UK presence. Known for competitively priced boilers.

687 fault codes
39 models documented
8 currently sold
31 legacy models

Ferroli fault codes on this site

We document 687 fault codes across 39 Ferroli models, covering 275 distinct codes. Ferroli boilers use letter-and-number codes such as A01, A02, A03. Codes for 33 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: Modena HE, Modena F, i25, i29, DOMINAplus F24D, DOMINAplus F28D, Sigma, Optimax, Domiproject, Falcon, Arena, Domi Compact, Econcept 100, Arena 30A, Domina 102, F 30 B, F24, Hawk II, Maxima 35 S, Optima 201, Sigma 40 FF, Tempra 12 18, Xignal, Combi 77 FF Popular, Energy Top B, Pegasus 67 107 2S, Atlas A, Atlas D, Extrema C, F24b, Force W, Leb TS, Arena 30 C, Bluehelix Pro RRT, Optimax HE 31 C, Optimax HE Plus, Bluehelix HiTech RRT, Bluehelix Tech RRT, Bluehelix Tech RRT 34C.

Codes that appear on the most Ferroli models:
F37 A01 F10 F34 A06 F11
Just want the most common Ferroli problems?
The top 8 faults across the whole Ferroli range — causes, DIY checks, repair costs.
Most serious

High-severity Ferroli fault codes

A01
Your boiler has failed to light the flame, which means you currently have no heating or hot water.
Modena HE
 A02
Your boiler thinks it sees a flame even though it hasn't started the burner yet, which is a safety conflict that prevents it from running.
Modena HE
 A03
Your boiler has likely overheated because the water isn't moving through the system properly or a safety sensor has detected a temperature that is too high.
Modena HE
 A04
Your boiler has shut down because it detected a repeat issue with its exhaust system three times in one day.
Modena HE
 A05
Your boiler has stopped working because its internal fan, which safely exhausts gases, is not communicating correctly with the main control board.
Modena HE
All models

39 Ferroli boiler models

Modena HE
SystemCombi Discontinued
25 fault codes · 2012-2016
Modena F
Combi Discontinued
9 fault codes · 2006-2015
i25
Combi
18 fault codes · 2017 onwards
i29
Combi
18 fault codes · 2017 onwards
DOMINAplus F24D
Combi Discontinued
27 fault codes
DOMINAplus F28D
Combi Discontinued
24 fault codes
Sigma
Regular Discontinued
8 fault codes
Optimax
CombiSystem Discontinued
0 fault codes · 2008-2015
Domiproject
Combi Discontinued
0 fault codes · 2006-2016
Falcon
Combi Discontinued
18 fault codes · 2007-2012
Arena
Combi Discontinued
36 fault codes
Domi Compact
Combi Discontinued
0 fault codes · 2006-2012
Econcept 100
System Discontinued
7 fault codes
Arena 30A
System Discontinued
2 fault codes
Domina 102
Combi Discontinued
26 fault codes · 2000-2005
F 30 B
Combi Discontinued
14 fault codes
F24
Combi Discontinued
2 fault codes
Hawk II
Combi Discontinued
11 fault codes · 2013-2018
Maxima 35 S
System
23 fault codes · 2018-present
Optima 201
Combi Discontinued
12 fault codes · 2006-2010
Sigma 40 FF
Combi Discontinued
10 fault codes
Tempra 12 18
System Discontinued
0 fault codes
Xignal
Combi Discontinued
14 fault codes
Combi 77 FF Popular
Combi Discontinued
8 fault codes · 1994-2000
Energy Top B
System Discontinued
21 fault codes
Pegasus 67 107 2S
Regular Discontinued
0 fault codes
Atlas A
Regular Discontinued
2 fault codes · 2008-2016
Atlas D
Regular Discontinued
15 fault codes
Extrema C
Combi Discontinued
27 fault codes
F24b
Combi Discontinued
9 fault codes
Force W
System
30 fault codes · 2019-present
Leb TS
Electric Discontinued
23 fault codes
Arena 30 C
Combi Discontinued
18 fault codes
Bluehelix Pro RRT
System
54 fault codes · 2019-present
Optimax HE 31 C
CombiSystem Discontinued
32 fault codes · 2008-2015
Optimax HE Plus
CombiSystem Discontinued
22 fault codes · 2009-2017
Bluehelix HiTech RRT
Combi
40 fault codes · 2022-present
Bluehelix Tech RRT
Combi
64 fault codes · 2018-present
Bluehelix Tech RRT 34C
Combi
18 fault codes · 2018-present
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