Select a fault code
System pressure below minimum.
Boiler failed to ignite after three attempts.
Flame established but went out during operation.
Communication fault on the eBUS (wiring between boiler and controls).
A fault with the comfort mode (pre-heating) function.
Gas valve not seating correctly — safety lockout.
PCB memory error detected.
Water pressure sensor implausible signal.
No pressure change detected on startup.
No temperature rise detected at startup — possible heat exchanger or pump issue.
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