BoilerFaultCodesWhat the manual says
Manufacturer manualstand-by mode
What causes this fault?
This fault occurs when the boiler's control board loses communication with the sensors that monitor water temperature. It is usually caused by a sensor element failing due to age or a loose electrical connection in the internal wiring. Because the boiler can no longer confirm it is operating at a safe temperature, it shuts down instantly to prevent overheating.
DIY fix possible
Check your room thermostat is set to a higher temperature than the current room temperatureEnsure your heating timer or programmer is set to 'On'If the boiler still does not fire, check your hot water tap or cylinder settings
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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All 22 fault codes on the Avanta Plus 18s System
Seeing a different code? Every code this model can display, in one place.