BoilerFaultCodes
Johnson Starley Boiler Fault Codes
446 fault codes across 12 Johnson Starley boiler models — explained in plain English.
Warwick-based UK manufacturer of warm air and water heating systems.
Just want the most common Johnson Starley problems?
The top 8 faults across the whole Johnson Starley range — causes, DIY checks, repair costs.
High-severity Johnson Starley fault codes
Fault Image 12 13 21 26
Your boiler has detected an internal control error and has locked itself out to ensure your safety.
Warmaheat
Your boiler has stopped working as a safety precaution due to an internal system failure that prevents it from starting correctly.
Warmaheat
Your boiler has tried to light several times but has failed to stay on, so it has locked itself out for safety.
Warmaheat
Your boiler’s internal control board is having trouble reading its own data correctly, which prevents the system from starting safely.
Warmaheat
Your boiler is repeatedly struggling to keep the flame lit and has locked itself out for safety.
Warmaheat
All models
12 Johnson Starley boiler models
Warmaheat
Regular Discontinued
Comet 60
Regular Discontinued
Comet 80
Combi Discontinued
Comet 100
Regular Discontinued
Warmaflow F80E
Regular Discontinued
Optima E20
Regular Discontinued
J32 System ET
System Discontinued
C10d
Regular Discontinued
C16d
Regular Discontinued
C16u
Regular Discontinued
C26d
Combi Discontinued
Warmcair DW
Regular