BoilerFaultCodesThe 6 most common faults
Your boiler has failed to light the flame, which means you currently have no heating or hot water.
Why it happens: This fault occurs when the boiler attempts to start up but cannot confirm that a flame has been established. The most common reasons are a lack of gas reaching the burner, a worn-out ignition spark, or a sensor failing to detect the heat even if the flame did briefly light.
Check if your gas supply is turned on and other gas appliances are workingPress the 'Reset' button on the boiler control panel for 1 secondCheck that your condensate pipe (outside) has not frozen during cold weather
Your boiler is failing to stay lit after it tries to start up, meaning it cannot provide you with heating or hot water.
Why it happens: This fault occurs when the boiler successfully creates a spark and ignites the gas, but then fails to detect that the flame is actually burning. The most common reasons are a dirty or worn-out detection sensor that can't 'see' the fire, or a faulty gas valve that isn't providing a steady enough flow of fuel to keep the flame stable.
Check that your gas supply is turned on at the meterCheck if other gas appliances, like a hob, are working correctlyReset the boiler by pressing the 'Reset' button for 1 second
Your boiler has sensed that parts of the internal system have become too hot, causing it to shut down automatically to prevent damage.
Why it happens: This fault occurs when the internal temperature of the boiler rises above a safe limit, usually because water isn't moving through the system fast enough to carry heat away. The most common reasons are a failing circulation pump, a build-up of sludge or limescale blocking the heat exchanger, or a 'pocket' of air trapped within the unit.
Check that your radiator valves are open to allow water to circulate.Ensure there is enough water pressure in the system (typically 1.0 to 1.5 bar).Press the 'Reset' button on the control panel to see if the fault clears.
Your boiler has sensed that parts of the internal system have become too hot, causing it to shut down automatically to prevent damage.
Why it happens: This fault occurs when the internal temperature of the boiler rises above a safe limit, usually because water isn't moving through the system fast enough to carry heat away. The most common reasons are a failing circulation pump, a build-up of sludge or limescale blocking the heat exchanger, or a 'pocket' of air trapped within the unit.
Check that your radiator valves are open to allow water to circulate.Ensure there is enough water pressure in the system (typically 1.0 to 1.5 bar).Press the 'Reset' button on the control panel to see if the fault clears.
Your boiler has stopped working because the water pressure inside the system is too low.
Why it happens: This fault occurs when the water pressure inside your heating system drops below the minimum level required for the boiler to operate safely. The most common reasons for this are a leak somewhere in the pipework or radiators, or because you have recently bled your radiators without topping the water back up.
Locate the filling loop (usually a silver flexible hose) under or near the boiler.Slowly open the valve or valves until you hear water flowing into the system.Watch the pressure gauge and close the valves once the needle reaches 1.5 bar.
Your boiler has sensed that the temperature is rising too quickly inside the unit, often caused by water not flowing through the pipes fast enough.
Why it happens: This fault occurs when the boiler's internal sensors detect that the heat is increasing much faster than the water can carry it away. The most common reason is a restriction in water flow, often caused by a failing pump or a build-up of sludge and debris blocking the narrow pipes inside the heat exchanger.
Check that your boiler pressure is between 1.0 and 1.5 barEnsure all radiator valves and isolation valves are fully openCheck for any air trapped in the system and bleed your radiators
on the Ferroli BlueHelix Pro 32C
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 Ferroli 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