BoilerFaultCodes A
Faulty ventilation system
Ariston Genus Fault codes & diagnostics
17 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 23-30 kW 1998-2007 Discontinued
GC Number 47-116-13
Replaced by: Genus Premium
Download the Ariston Genus manual
PDF
Versions & GC numbers
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
Severity at a glance
Each cell = one fault code. Hover to identify. 7 High
10 Unrated
Which version do you have?
The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 47-116-13 | Genus 30 MFFI | 1999–2007 |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
Just want the most common Ariston Genus faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 17 documented codes
Tap any card for details
A01 Your boiler is trying to start but cannot get the flame lit, so it has shut itself down as a safety precaution.
Your boiler is trying to start but cannot get the flame lit, so it has shut itself down as a safety precaution.
Parts commonly replaced
- Ignition electrode
- Gas valve
- PCB
Related codes
A03 Your boiler has detected that it is overheating and has shut itself down as a safety precaution to prevent damage.
Your boiler has detected that it is overheating and has shut itself down as a safety precaution to prevent damage.
Parts commonly replaced
- NTC temperature sensor
- Circulation pump
- Heat exchanger
Related codes
A07 Your boiler is repeatedly struggling to keep its internal flame lit, causing it to shut down for safety reasons.
Your boiler is repeatedly struggling to keep its internal flame lit, causing it to shut down for safety reasons.
Parts commonly replaced
- Ionisation electrode
- Gas valve
- PCB
Related codes
b
Air pressure switch stuck in N.O.position
C
Faulty reset switch
d
Faulty main circuit flow switch
E
Faulty flame detection
E01
Ignition failure
E02 Your boiler is struggling to clear exhaust gases effectively, so it has safely shut itself down to prevent any risk of fumes entering your home.
Your boiler is struggling to clear exhaust gases effectively, so it has safely shut itself down to prevent any risk of fumes entering your home.
Parts commonly replaced
- Air pressure switch
- Flue fan assembly
- Venturi tube
Related codes
E02 071 Your boiler is struggling to clear exhaust gases due to a sensor fault or exterior blockage, so it has safely shut itself down to prevent carbon monoxide buildup.
Your boiler is struggling to clear exhaust gases due to a sensor fault or exterior blockage, so it has safely shut itself down to prevent carbon monoxide buildup.
Parts commonly replaced
- Air pressure switch
- Flue fan
- Venturi tube
E02 078 Your boiler is failing to ignite the main burner, which means it cannot produce the flame required to provide heating or hot water.
Your boiler is failing to ignite the main burner, which means it cannot produce the flame required to provide heating or hot water.
Parts commonly replaced
- Ignition electrode
- Gas valve
- Flame rectification probe
Related codes
E03 Your boiler is struggling to clear air or smoke properly, so it has safely shut itself down to prevent any unsafe operation.
Your boiler is struggling to clear air or smoke properly, so it has safely shut itself down to prevent any unsafe operation.
Parts commonly replaced
- Air pressure switch
- Flue fan
- Venturi
F
Faulty overheat thermostat
G
Faulty exhaust fumes sensor
I
Faulty heating sensor (N.T.C.)
m
Faulty D.H.W.sensor (N.T.C.)