BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working and locked itself for safety because it failed to light or stay lit correctly.
Check if your gas prepay meter has credit and that the gas supply is turned on.Press and hold the reset button for 5 seconds to see if the boiler restarts.If you have a condensate pipe leading outside, check that it is not frozen if the weather is very cold.
Your boiler has tried to light itself several times without success and has now locked itself out for safety.
Check that your gas prepayment meter has creditEnsure other gas appliances, like a cooker, are working to confirm gas supplyPress the reset button on the boiler control panel once
Your boiler has detected that there is not enough water pressure in the system to operate safely, causing it to shut down.
Locate the filling loop (usually a silver flexible hose) under or near the boiler.Slowly open the small valves on the filling loop until you hear water flowing.Watch the pressure gauge and close the valves once the needle reaches between 1.0 and 1.5 bar.
Your boiler has stopped working because it cannot detect any water pressure in the system.
Check the pressure gauge on the front of the boiler or under the casing.If the needle is below 1 bar, use the external filling loop valves to top up the water pressure to 1.5 bar.Reset the boiler to clear the fault code.
Your boiler has failed to light after several attempts and has locked itself for safety.
Check that your gas pre-payment meter (if you have one) has creditEnsure other gas appliances in the home, like a hob, are working correctlyPress and hold the reset button for five seconds to restart the ignition sequence
Your boiler thinks it sees a flame even though it isn't supposed to be running, causing it to shut down for safety.
Locate the reset button on the control panelPress and hold the reset button for 2 to 5 secondsWait for the boiler to restart and check if the error clears
on the Johnson Starley Warmaflow F80E
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 Johnson Starley 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