BoilerFaultCodesThe 6 most common faults
Your boiler has failed to ignite, meaning it cannot light the gas flame required to provide heating and hot water.
Check if other gas appliances, like a cooker, are working to ensure gas is reaching the property.Ensure your gas pre-payment meter is in credit.Press and hold the 'R' or reset button for 3 seconds to attempt a restart.
Your boiler has switched itself off because internal sensors have detected that the water inside the unit is getting too hot, preventing potential damage.
Check that your radiator valves are fully open to allow water to circulate.Ensure your system water pressure is between 1.0 and 1.5 bar on the gauge.Restart the boiler using the reset button once the unit has cooled down.
Your boiler is failing to detect a flame or the flame is cutting out, so the system has shut down for safety.
Check if other gas appliances in your home (like a hob) are working to ensure gas is reaching the propertyCheck that your gas prepayment meter has credit if applicablePerform a 'Reset' by turning the control knob to the R position for a few seconds
Your boiler has detected that the temperature sensors aren't reacting as quickly as expected, which usually means water isn't flowing correctly through the system.
Check that all radiator valves are fully openEnsure the boiler pressure is between 1.0 and 1.5 bar on the pressure gaugeGently bleed air from your radiators using a radiator key
Your boiler has detected that there is not enough water in the system to operate safely and has shut down.
Locate the filling loop (a flexible silver hose) underneath or near the boiler.Slowly open the valve(s) to let water into the system while watching the pressure gauge.Close the valves tightly once the pressure reaches between 1.0 and 1.5 bar.
Your boiler thinks a flame is burning even when it should be off, causing it to shut down for safety.
Full guide for E02on the ECA Proteus Premix 24 HCH
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 ECA 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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