BoilerFaultCodes
The most common Johnson Starley faults
Your boiler has detected that it is not working correctly and has shut down as a safety precaution.
Locate the reset button on the control panelPress and hold the reset button for 5 secondsCheck if the system pressure gauge is between 1.0 and 1.5 barEnsure all isolation valves under the boiler are fully open
Your boiler has entered a general safety shutdown and needs to be manually restarted to check if the error is temporary.
Locate the reset button on the boiler control panelPress and hold the reset button for several secondsWait for the boiler to complete its startup sequenceEnsure your thermostat is calling for heat
Your boiler has tried to light several times but has failed to stay on, so it has locked itself out for safety.
Check that your gas pre-pay meter has credit (if applicable)Check that other gas appliances like your hob are working to ensure gas supplyPress the reset button on the boiler control panel once
Your boiler's internal computer has encountered a memory error and can no longer process data correctly.
Switch the boiler off at the main electrical fused spur switchWait for 60 secondsSwitch the power back on and see if the display clears
Your boiler has detected that the water pressure in the central heating system is too low and it has stopped working as a safety precaution.
Locate the external filling loop, which is usually a silver braided flexible hose under or near the boiler.Slowly open the one or two valves on the hose to let water into the system.Watch the pressure gauge and close the valves tightly once the needle reaches between 1.0 and 1.5 bar.
Your boiler has detected that there is too much water pressure inside the system, causing it to shut down for safety.
Check that the silver filling loop valves are tightly closedBleed water from a radiator using a bleed key to reduce pressureMonitor the pressure gauge to ensure it stays between 1.0 and 1.5 barReset the boiler once the pressure is back in the green zone
Your boiler has stopped working because it cannot detect any water pressure, which means it cannot safely heat your home.
Locate the pressure gauge on the front of the boiler or underneath it.If the needle is below 1 bar, find the filling loop (a flexible silver hose).Slowly open the valve(s) until the pressure reaches 1.5 bar, then close them tightly.Press the 'Reset' button on the control panel.
Your boiler has tried to light several times but failed, so it has locked itself for safety.
Check that your gas prepayment meter has creditEnsure your external gas stopcock is fully openPress and hold the reset button for five seconds