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Ariston Clas HE R 18 Fault codes & diagnostics
30 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Gas 2008 onwards Discontinued
GC Number 41-116-31
Download the Ariston Clas HE R 18 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. 30 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 |
|---|---|---|
| 41-116-31 | Clas HE R 18 | 2008–2013 |
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 Clas HE R 18 faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 30 documented codes
Tap any card for details
1 03
Insufficient circulation
1 04
1 05
1 06
1 07
1 10
Flow temp. probe circuit open / short circuit
1 12
Return temp. probe circuit open / short circuit
1 14
External sensor circuit open / short circuit
1 18
Heating delivery probe problem
Showing 11–20 of 30
1 P1
Insufficient circulation indication
1 P2
1 P3
3 01
EEPROM error
3 02
Comunication error
3 03
Main P.C.B. error
3 04
Too many (> 5) resets in 15 minutes
3 05
Main P.C.B. error
3 06
Main P.C.B. error
3 07
Main P.C.B. error
Showing 21–30 of 30
5 01
No flame detected
5 02
Flame detected with gas valve closed
5 04
Flame lift
5 P1
1st Ignition Failed
5 P2
nd Ignition Failed
5 P3
Flame cut-off
6 04
Insufficient fan speed
6 10
Thermofuse open
E00
Error number
E99
Error number