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What does my fault code mean?

  • Flashing L AND 1 Flow Temperature Overheat or No Water Flow

    Ensure that all radiator valves are open Check that the water pressure to the boiler is at 1 to 1.5 BAR. View our video on how to top up your boiler pressure here.Reset the boilerIf this does not fix the problem, please contact us

    Learn more

  • Flashing L AND 2 Flame Loss or Ignition Lockout
    • Reset the boiler

    • If your gas meter is pay-as-you-go, check there is credit available

    • Check other gas powered items in your home, if these are also not working, you should contact a local gas engineer

    • Check that the yellow gas isolation valve under the boiler hasn't been turned off. If it is on, the handle/knob will be in pointing in the direction of the pipe.

    • If the boiler is making a gurgling/gargling noise whilst trying to fire, please contact your installer as there may be a blockage

    • If this does not fix the problem, call us quoting Error Code L2

  • Flashing L AND 3 No Water Flow
    • Check that the water pressure to the boiler is at 1 to 1.5 BAR.

    • Check that the yellow gas isolation valve under the boiler hasn't been turned off. If it is on, the handle/knob will be in pointing in the direction of the pipe

    • Turn the boiler off and bleed/let out the air of your radiatiors. Ensure the boiler pressur is still at 1 to 1.5 BAR and turn the boiler back on

    • Press the reset button

    • If this does not fix the problem, please contact us quoting error code L3

    View our video on how to top up your boiler pressure: <iframe width="560" height="315" src="https://www.youtube.com/embed/13g6nRKmjjU" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

  • Flashing L AND 5
    • The boiler has been reset too many times in 15 minutes.

    • Turn the power to the boiler on and off again to reset

  • Flashing L AND 6 False Flame Lockout
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code L6 as this will require a visit from an engineer.

  • Flashing F AND 1 Low Pressure
    • Water pressure is too low in the system and will require topping up to between 1 and 1.5 BAR 

    View our video on how to top up your boiler pressure:

    <iframe width="560" height="315" src="https://www.youtube.com/embed/13g6nRKmjjU" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

  • Flashing F AND 2 Flame Loss / Ignition Lockout
    • Reset the boiler

    • If your gas meter is pay-as-you-go, check there is credit available

    • Check other gas powered items in your home, if these are also not working, you should contact a local gas engineer

    • Check that the yellow gas isolation valve under the boiler hasn't been turned off. If it is on, the handle/knob will be in pointing in the direction of the pipe.

    • If the boiler is making a gurgling/gargling noise whilst trying to fire, please contact your installer as there may be a blockage

    • If this does not fix the problem, call us quoting Error Code F2

  • Flashing F AND 3 Fan Fault
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code F3 as this will require a visit from an engineer.

  • Flashing F AND 4 Flow Thermistor
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code F4 as this will require a visit from an engineer.

  • Flashing F AND 5 Return Thermistor
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code F5 as this will require a visit from an engineer.

  • Flashing F AND 6 Outside Sensor Fault
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code F6 as this will require a visit from an engineer.

  • Flashing F AND 7 Low Mains Volume
    • Voltage to the boiler may be too low

    • Contact a local electrician to inspect the electrics of your property

  • Flashing F AND 0 No Water Flow Thermistor
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code F0 as this will require a visit from an engineer.

  • Flashing C AND 2 BCC Chip
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code C2 as this will require a visit from an engineer.

  • Flashing C AND 0 BCC Activation Fault
    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code C0 as this will require a visit from an engineer.