BoilerFaultCodesThe 6 most common faults
01
E030 High Engineer
Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage to the internal components.
Full guide for E03002
E040 High Engineer
Your boiler has detected that the internal mechanism responsible for safely clearing exhaust gases is not working, so it has shut down to prevent unsafe operation.
Full guide for E04003
E041 High Engineer
Your boiler is struggling to detect enough water pressure to operate safely and has shut down to prevent damage.
Full guide for E04104
E042 High Engineer
Your boiler is struggling to detect the flow of water because a sensor inside the unit is not sending the correct signal.
Full guide for E04205
E077 High Engineer
Your boiler is struggling to detect the movement of water, which means it has stopped heating your home or water to prevent internal damage.
Full guide for E07706
E080 High Engineer
Your boiler has detected that the water inside the system is getting far too hot, so it has shut down to prevent damage to itself.
Full guide for E080on the Vokera Vision System Sgc
Limit thermostatSystem pumpSystem filterHeat exchangerFan assemblyWiring harness
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 Vokera 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