BoilerFaultCodes
The most common Ariston faults
Your boiler has detected that the water temperature in your secondary heating circuit is higher than it should be, causing the system to shut down to prevent damage.
Why it happens: This fault occurs when the water temperature in your second heating zone exceeds safe limits, prompting the boiler to shut down to prevent damage. It is usually caused by a physical blockage in that specific part of the system, a failed zone valve that won't open, or a pump that isn't circulating the hot water away from the boiler quickly enough.
Full guide for E-Combi One 7 22Your boiler has disabled your heating system because it cannot detect or communicate with the controls that request heat for your radiators.
Why it happens: This fault occurs when the boiler’s main computer loses touch with your heating controls or receives conflicting information about how many heating zones it should be managing. It is essentially a 'handshake' failure where the boiler disables the heating to prevent damage because it no longer knows which part of the house is calling for heat. The most common reasons are a loose connection in the wiring, a failed external thermostat, or a software glitch on the main circuit board.
Full guide for E-Combi One 7 50Your 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 is struggling to move water through your heating system effectively, preventing it from heating your home properly.
Check that all your radiators have their thermostatic valves fully openEnsure your heating system pressure is between 1 and 1.5 bar on the gaugeBleed your radiators to remove any trapped air that might be blocking the flow
Your boiler is struggling to move water through the system efficiently, which usually means the water pressure is too low or something is blocking the flow.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If pressure is low, use the filling loop underneath the boiler to top it up.Ensure all radiator valves are fully open and bleed any radiators that have trapped air.
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