BoilerFaultCodesThe 6 most common faults
Your boiler is trying to start up but cannot light the internal flame needed to heat your water.
Check if other gas appliances, like a hob, are working to ensure gas is reaching your home.Check your gas meter to ensure it has credit.Press and hold the 'R' reset button for several seconds to try and restart the boiler.
Your boiler has detected that it is running too hot and has automatically shut down to prevent damage to its internal parts.
Wait for the boiler to cool down for at least 30 minutesCheck that your radiator valves are open and not turned to zeroPress and hold the 'R' (Reset) button for a few seconds to restart the unit
Your boiler has failed to light the flame after several attempts and has safely locked itself to prevent gas buildup.
Switch the electricity supply to the boiler off at the fused spur switchWait for 30 secondsSwitch the power back on to clear the lockout memory
Your boiler has stopped because the water pressure inside the heating system has dropped too low to operate safely.
Locate the external filling loop, usually two silver valves connected by a flexible braided hose underneath the boiler.Open both 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.Fully close both taps to stop the flow and ensure the braided hose is not leaking.
Your boiler's control panel is not responding correctly, which is preventing the system from starting up or adjusting its settings.
Check if any buttons on the front panel are physically stuck or depressed.Gently press each button to ensure they click and release properly.Turn the power to the boiler off at the fused spur switch, wait 30 seconds, and turn it back on.
Your boiler has stopped working because it cannot detect a flame, meaning it is currently unable to safely heat your home or water.
Check that your gas prepayment meter has credit (if applicable)Check if other gas appliances in your home, such as a hob, are working correctlyPress and hold the 'Reset' button for 3 seconds
on the Alpha E-Tec
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