BoilerFaultCodesYour boiler is working normally and the number you see is simply the current temperature of the water inside the unit.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: No error, display shows current boiler temperature
What causes this fault?
This is not actually a fault, but rather the boiler's standard operating mode. The single digit '0' indicates that the boiler is in standby mode and is ready to provide heat or hot water whenever you turn a tap or the thermostat up. The subsequent numbers you see are simply the live temperature of the water currently inside the heat exchanger.
DIY fix possible
No action requiredMonitor the display to ensure it changes when you turn on your heating or hot water
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A boiler cover plan would cover faults like 0 — no call-out fees, no surprises.
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