BoilerFaultCodesThe 6 most common faults
Your boiler has become too hot and has shut itself down as a safety precaution to prevent internal damage.
Check that all radiator valves are fully open to allow water to circulate.Ensure your system pressure is between 1 and 1.5 bar on the pressure gauge.Press the Reset button on the front control panel and wait for the boiler to restart.
Your boiler has stopped working because water is not moving through the system quickly enough to prevent it from getting too hot.
Check that your radiator valves are fully openEnsure your boiler pressure is between 1 and 1.5 barGently bleed your radiators to remove trapped air
Your boiler is struggling to move water through the system, which is causing it to shut down to prevent overheating.
Check that all radiator valves are fully openEnsure your boiler pressure is between 1.0 and 1.5 barGently bleed your radiators to remove any trapped air
Your boiler is struggling to move hot water around the system, often caused by trapped air or low pressure preventing it from flowing correctly.
Check the pressure gauge and top up to 1.5 bar if it is lowBleed all radiators to remove any trapped air pocketsEnsure all radiator valves and the boiler isolation valves are fully open
Your boiler has lost water pressure and needs to be topped up to work properly again.
Locate the filling loop (usually blue levers) underneath the boiler.Slowly open both levers until you hear water flowing into the system.Watch the pressure gauge and close the levers firmly when it reaches 1.5 bar.
Your boiler has too much water inside its system, causing it to shut down to prevent damage from high pressure.
Check that the filling loop valves are fully closed and not letting in waterBleed water from a radiator using a bleed key to reduce the system pressureMonitor the pressure gauge until it returns to between 1 and 1.5 barRestart the boiler once the pressure is within the normal operating range
on the Ariston E-Combi One 24
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Ariston shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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