BoilerFaultCodesThe 6 most common faults
Your boiler has tried to light several times but cannot establish a flame, meaning your heating and hot water will not work.
Check if other gas appliances, like a hob, are working to ensure gas is reaching the property.Verify that your gas meter has credit if you have a pre-payment meter.Press and hold the 'R' or reset button for a few seconds to see if the boiler restarts.During freezing weather, check if the white plastic condensate pipe leading outside is frozen and thaw it with warm water.
Your boiler has become too hot and has shut down as a safety precaution to prevent damage.
Wait 30 minutes for the boiler to cool down naturally.Ensure all radiator valves are fully open and there are no blockages.Press and hold the reset button for a few seconds to restart the system.
Your boiler has detected that the water pressure is outside the safe operating range, usually meaning it is too low to run properly.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is below 1 bar, use the filling loop valves under the boiler to carefully top it up with water.Close the valves tightly once the needle reaches 1.5 bar and press the reset button.
Your boiler has stopped working because the water pressure inside the system has dropped too low.
Check the pressure gauge on the front of the boiler; it should ideally be between 1 and 1.5 bar.Locate the filling loop (usually a silver braided hose with one or two small taps underneath the boiler).Slowly open the tap(s) until you hear water entering and see the pressure gauge rise to 1.2 bar, then close them tightly.
Your boiler is struggling to move water through the system, which is causing it to overheat and shut down for safety.
Check that all your radiator valves (TRVs) are turned to the highest settingEnsure your boiler pressure is between 1.0 and 1.5 barBleed your radiators to remove any trapped air
Your boiler has lost its connection with the external thermostat or control panel, meaning it cannot receive instructions to turn the heating on.
Check if your wireless thermostat has run out of batteries and replace them if necessaryEnsure the thermostat is within range of the boiler and hasn't been moved too far awayTurn the electrical power to the boiler off and back on again after 30 seconds to restart the connection
on the Alpha Eco 11 13
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