Evo Boiler Fault Codes
16 fault codes across 2 Evo boiler models — explained in plain English.
Evo boilers (built by Ideal for Wolseley).
Just want the most common Evo problems?
The top 8 faults across the whole Evo range — causes, DIY checks, repair costs.
High-severity Evo fault codes
H 9 L 9 HE H9 L9
Your boiler has detected an internal communication error between its electronic control boards or an incorrect configuration.
HE 12
Your boiler has overheated, causing it to shut down automatically for safety.
HE 12
Your boiler's internal computer has encountered a critical communication error and can no longer control the heating system safely.
HE 12
Your boiler has shut down because the exhaust gases have reached a temperature that is too high, which is a safety feature to prevent damage to the system.
HE 12
Your boiler has sensed that the exhaust gases are getting too hot and has shut down as a safety precaution to prevent internal damage.
HE 12
All models
2 Evo boiler models
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