BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because it cannot maintain a stable flame, meaning it is currently unable to provide you with heating or hot water.
Check if other gas appliances, like a hob, are working to ensure gas supply is activeCheck if your gas meter has creditPress and hold the reset button for several seconds
Your boiler is trying to start but is unable to light the flame needed to produce heat or hot water.
Press and hold the reset button for several seconds to restart the ignition sequenceCheck that your gas meter has credit and the isolation valve is openTest another gas appliance, like a hob, to ensure gas is being supplied to the property
Your boiler has detected that it is running too hot and has automatically shut itself down to prevent any damage or safety risks.
Check that your radiator valves are openCheck that your boiler pressure is between 1.0 and 1.5 barPress the 'Reset' button on the front control panelEnsure no air is trapped in the system by bleeding your radiators
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Locate the external filling loop, usually two silver flexible hoses with small taps attached under the boiler.Open the taps slowly to allow water into the system until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.Close both taps tightly and check the boiler display to see if the fault has cleared.
The boiler's control panel detects that one of the buttons is jammed, preventing it from functioning correctly.
Switch off the boiler at the electrical fused spurGently press and release each button on the control panel to see if any feel stuck or fail to 'click'Use a dry, soft cloth or gentle air duster to remove any debris or sticky residue around the buttonsWait 5 minutes and switch the power back on to see if the error clears
Your boiler is struggling to pump water around your heating system fast enough, causing it to overheat and shut down for safety.
Check that your boiler pressure is between 1.0 and 1.5 barEnsure all radiator valves and isolation valves are fully openBleed your radiators to remove any trapped air pockets
on the Alpha Intec 50CS
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 Alpha 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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