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Ideal Heating
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FAQs & Help

Information & frequently asked questions on our boilers, parts & controls.

  • 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.

  • Flashing F AND D No Water Flow
    • Turn the boiler off and bleed/let out the air of your radiators. Ensure the boiler pressure is still at 1 to 1.5 BAR and turn the boiler back on.

    • Your central heating pump may not be running. Gently touch it and if it's working properly, there should be a gentle vibration and it should also be warm

    • If you believe the central heating pump is NOT running, contact your installer.

    • If you believe the central heating pump is running, please contact us quoting error code FA as this will require a visit from an engineer.

    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 U Flow & Return Differential more than 50⁰
    • There difference between the water flow and return is too high (more than 50⁰)

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

    • Possible blockage, please contact us quoting error code FU (we won't take offence) as this will require a visit from an engineer.

    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 A Flow & Return Reversed
    • The flow and return differential is wrong and may have been installed correctly / possible crossed pipes.

    • Please contact the installer