BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because it cannot stay lit, meaning your heating and hot water have turned off as a safety precaution.
Check that your gas emergency control valve is openIf you have a prepayment meter, check that you have sufficient creditPress and hold the reset button for several seconds to restart the boiler
Your boiler has failed to light the flame needed to generate heat, and it will keep trying to restart until the fault is cleared.
Check if other gas appliances like a hob are working to ensure gas is reaching the propertyCheck that your gas meter has credit if you use a prepay meterPress and hold the 'R' reset button for 2 seconds to see if the boiler restartsCheck that the condensate pipe (typically a white plastic pipe leading outside) isn't frozen in cold weather
Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent any damage or danger.
Check that your radiator valves are open and not turned off.Wait 30 minutes for the system to cool down completely.Press and hold the 'R' reset button for a few seconds to restart the boiler.
Your boiler has attempted to restart itself too many times after encountering a series of underlying issues and has now locked itself out for safety.
Turn the power to the boiler off at the fused spur switch (the wall switch).Wait for 30 seconds.Turn the power back on to clear the lockout memory and allow a further reset.
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 valves connected by a braided metal hose underneath the boiler.Open the valves 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 valves firmly and ensure they are fully tightened.
Your boiler's control panel has detected that one of its buttons is permanently held down or jammed, preventing the system from operating normally.
Switch off the boiler power at the fused spur or mains switch.Carefully inspect the control panel buttons or digital interface for any dirt, debris, or sticky residue that might be holding a button in place.Gently press or wiggle the buttons to see if they can be un-stuck, then power the boiler back on to see if the code clears.
on the Alpha E-Tec Plus 28
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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