Ferroli Boiler Fault Codes

973 fault codes across 42 Ferroli boiler models — explained in plain English.

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

973 fault codes
42 models documented
8 currently sold
34 legacy models

Ferroli fault codes on this site

We document 973 fault codes across 42 Ferroli models, covering 318 distinct codes. Ferroli boilers use a mix of numbered codes and light or status indications. Codes for 41 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: Bluehelix Tech, Modena HE, Modena F, i25, i29, DOMINAplus F24D, DOMINAplus F28D, Sigma, Optimax, Domiproject, Falcon, Arena, Domi Compact, Tempra, 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, Bluehelix Tech RRT 24C, Optimax 25 C, Optimax HE 31 C, Optimax HE Plus, Bluehelix HiTech RRT, Bluehelix Tech RRT.

Codes that appear on the most Ferroli models:
F10 F37 F34 A02 F39 A01
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.
Bluehelix Tech
 A02
Your boiler detects a flame when it should be turned off, which prevents the system from starting up safely.
Bluehelix Tech
 A05
Your boiler has stopped working because the internal fan, which safely removes waste gases, is not spinning at the correct speed.
Bluehelix Tech
 A06
Your boiler is failing to stay lit after it tries to start up, meaning it cannot provide you with heating or hot water.
Bluehelix Tech
 F14
Your boiler has shut down because the exhaust fumes have become dangerously hot, which could indicate a blockage or a heat exchanger problem.
Bluehelix Tech
All models

42 Ferroli boiler models

Bluehelix Tech
CombiSystem Discontinued
44 fault codes · 2013-2018
Modena HE
SystemCombi Discontinued
28 fault codes · 2012-2016
Modena F
Combi Discontinued
11 fault codes · 2006-2015
i25
Combi
5 fault codes · 2017 onwards
i29
Combi
5 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
48 fault codes · 2008-2015
Domiproject
Combi Discontinued
39 fault codes · 2006-2016
Falcon
Combi Discontinued
22 fault codes · 2007-2012
Arena
Combi Discontinued
80 fault codes
Domi Compact
Combi Discontinued
11 fault codes · 2006-2012
Tempra
Combi Discontinued
9 fault codes · 2005-2010
Econcept 100
System Discontinued
7 fault codes
Arena 30A
System Discontinued
31 fault codes
Domina 102
Combi Discontinued
15 fault codes · 2000-2005
F 30 B
Combi Discontinued
14 fault codes
F24
Combi Discontinued
10 fault codes
Hawk II
Combi Discontinued
11 fault codes · 2013-2018
Maxima 35 S
System
23 fault codes · 2018-present
Optima 201
Combi Discontinued
42 fault codes · 2006-2010
Sigma 40 FF
Combi Discontinued
10 fault codes
Tempra 12 18
Regular Discontinued
7 fault codes
Xignal
Combi Discontinued
14 fault codes
Combi 77 FF Popular
Combi Discontinued
9 fault codes · 1994-2000
Energy Top B
System Discontinued
20 fault codes
Pegasus 67 107 2S
Regular Discontinued
3 fault codes
Atlas A
Regular Discontinued
2 fault codes · 2008-2016
Atlas D
Regular Discontinued
9 fault codes
Extrema C
Combi Discontinued
25 fault codes
F24b
Combi Discontinued
9 fault codes
Force W
System
28 fault codes · 2019-present
Leb TS
Electric Discontinued
22 fault codes
Arena 30 C
Combi Discontinued
18 fault codes
Bluehelix Pro RRT
System
44 fault codes · 2019-present
Bluehelix Tech RRT 24C
Combi
54 fault codes · 2018-present
Optimax 25 C
Combi Discontinued
49 fault codes
Optimax HE 31 C
CombiSystem Discontinued
32 fault codes · 2008-2015
Optimax HE Plus
CombiSystem Discontinued
4 fault codes · 2009-2017
Bluehelix HiTech RRT
Combi
36 fault codes · 2022-present
Bluehelix Tech RRT
Combi
64 fault codes · 2018-present
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