BoilerFaultCodes
Johnson Starley Boiler Fault Codes
268 fault codes across 11 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
E01 F15 E03 F37 F40
Your boiler has tried to light several times but has been unable to create a flame, meaning you will not have any heating or hot water.
J32 System ET
Your boiler has stopped working because it has been manually reset too many times in a short window, suggesting an underlying fault that needs professional attention.
J32 System ET
Your boiler has shut down because it has detected it is getting too hot, which is a safety feature to prevent damage.
J32 System ET
Your boiler has stopped working because the water pressure in the central heating system has dropped too low.
J32 System ET
Your boiler has detected that the water pressure in the central heating system is too low or too high for it to operate safely.
J32 System ET
All models
11 Johnson Starley boiler models
J32 System ET
System Discontinued
C10d
Regular Discontinued
C16d
Regular Discontinued
C16u
Regular Discontinued
C26d
Combi Discontinued
Warmcair DW
Regular
Aquair S 10
Heat Interface Unit Discontinued
Aquair S 25
Heat Interface Unit Discontinued
Aquair S
Heat Interface Unit Discontinued
Reno HE
CombiSystem Discontinued
Quantec C
CombiSystem Discontinued
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