BoilerFaultCodesThe 6 most common faults
Your boiler has tried to light several times without success and has now shut itself down for safety.
Check if other gas appliances, like a hob, are working to ensure gas is reaching the propertyCheck that your gas meter has credit and the emerald valve hasn't trippedPress the manual reset button on the boiler control panel once to attempt a restart
Your boiler is not receiving the signal from your thermostat or programmer to turn on, meaning it thinks it doesn't need to heat your home.
Check that your room thermostat is turned up higher than the current room temperature.Ensure your central heating programmer or timer is set to 'ON' or 'AUTO'.Check if any batteries in your wireless thermostat need replacing.
Your boiler has no power reaching it, which means the system cannot start up to provide heating or hot water.
Check if your main heating programmer or thermostat is turned on and calling for heatEnsure the boiler's electrical isolation switch (fused spur) is turned onCheck your home's consumer unit (fuse box) to see if a circuit breaker has tripped
Your boiler has detected that it is trying to heat up without enough water flowing through it, causing it to shut down to prevent overheating.
Check that your external heating system pump is runningEnsure all radiator valves and isolation valves are fully openCheck that your header tank in the loft has water if you have an open-vented system
Your boiler has shut itself down because it has become too hot to operate safely.
Check that all radiator valves are fully open to allow water to circulate.Ensure the system pressure is correct if you have a sealed system.Wait for the boiler to cool down and then press the reset button or turn the control knob to 'O' and back to 'I'.
Your boiler has likely stopped working because it has exceeded a safe temperature limit and triggered a safety shut-down.
Locate the overheat reset button under the bottom casing of the boilerPress the reset button firmlyCheck that your radiator valves are open and that the pump is running
on the Baxi Solo 2
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 Baxi 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