BoilerFaultCodesThe 6 most common faults
Your boiler's burner has stopped working for safety reasons, meaning the system cannot fire up to provide heat or hot water.
Check that you have enough heating oil in your storage tank.Ensure the oil supply valves are fully open.Press the reset button on the burner control box once; if it fails again, do not keep resetting it and call an engineer.
Your boiler has reached an unsafe temperature and has automatically shut down to prevent damage or dangerous overheating.
Check that all radiator valves are open and not turned off.Ensure there is enough water pressure in the system by checking the pressure gauge.Press the manual reset button located on the control panel or behind the front cover.
Your boiler has stopped working because it cannot get enough oil to keep the flame going.
Check the oil level in your storage tank to ensure you haven't run out.Inspect the oil supply line valve to make sure it is fully open.Press the illuminated reset button on the burner once; do not press it more than twice.
Your boiler has stopped working because it has detected an issue with its electricity supply or internal wiring.
Check if other electrical appliances in your home are working to rule out a power cut.Ensure your boiler's power switch or fused spur is turned on.Press the manual reset button on the burner control box once to see if the system restarts.
Your boiler's burner has shut itself down for safety because it failed to light or stay lit properly.
Check that you have enough oil in your storage tank.Ensure the oil supply valves are fully open.Press the illuminated manual reset button on the burner once only.
Your boiler's burner has stopped working for safety reasons, meaning the system cannot fire up to provide heating or hot water.
Check that you have enough heating oil in your storage tank.Ensure the oil supply valves are fully open.Press the illuminated reset button on the burner once; if it fails to restart or locks out again immediately, do not keep pressing it.
on the Firebird Silver Slimline Systempac 2020
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 Firebird 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