BoilerFaultCodesJohnson Starley Aquair S 25 Fault codes & diagnostics
The manual for this boiler has no fault code table.
Heat Interface Unit Natural Gas 25 kW Discontinued
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No fault code table in its manual
We've read the Johnson Starley Aquair S 25 manual we hold, and it has no fault code table, so there are no codes to list. We don't fill the gap with codes from a similar boiler, because the same code can mean something different on another model. The fault code table in the installation manual is the one to trust.