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FAQs & Help

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

  • 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

  • Flashing S AND E Service Interval Timer

    Please contact the installer

  • Flashing L AND C: 5 Boiler Reset in 15 Minutes

    • 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 4 Flow Thermistor

    • Reset the boiler

    • If this does not fix the problem, please contact us quoting error code L4 as this will require a visit from an engineer.

  • Flashing D AND U Divertor valve in mid-position for service

    • Rotate all knobs fully clockwise

    • Turn the boiler off

    • Turn the boiler back on and then press restart

  • My central heating isn't working but hot water is working

    • Turn your thermostat to its maximum position and check if a C appears on the boiler display. If the boiler fires and the radiators come on, this means the room thermostat wasn't set higher than the room temperature.

    • If the boiler still doesn't fire, please contact us as this will require a visit from an engineer

  • When my hot water is running, the central heating is getting warm - with Combi Boiler installed

    Please contact us as this will require a visit from an engineer.

  • Why does my boiler lose pressure?

    Often, with a newly filled system, there can be air in the water used. Over time this is released into the system causing a pressure drop. Another cause of pressure loss could be not having enough expansion in the system.  There could also be a slight leak within the system which may not be noticeable without detailed checking.  Finally, it could be due to a component failure within the boiler. If the system requires topping up frequently it needs to be checked by a professional to find the source of the pressure loss.

  • My boiler display is blank, what does this mean?

    A blank display is an indication that there is no power to the boiler. Alternatively a component within the boiler may have failed and a callout is required, please contact our Customer Service department on 01482 498660.

  • What is the difference between a standard Logic and a Logic+?

    Our Logic and Logic+ boilers are very similar in appearance; the major components are the same but the software and displays on the boilers are different. Our Logic boilers currently have a 2-year warranty whereas Logic+ boilers currently have 7 years. 

  • What does fault code FA flashing on a Logic Combi 35 mean?

    This means there is an issue with the flow and return pipes are reversed. Although this is usually not the case on a combi boiler, If this occurs please check all isolation valves underneath the boiler are in the open position, all radiator valves are turned on full and the bypass is free flowing to see if this rectifies the issue, If it does it may be worth calling the installer of the boiler to take a look.

  • How do I check if my condensate pipe is blocked?

    In Winter, your condensate pipe may freeze and become blocked. This can easily be fixed by using a hot water bottle, or pouring warm water over the pipe itself. For more information on this check out our ‘How to’ video on YouTube. If the weather is milder it may be worth checking where the condense pipe terminates for blockages such as leaves. Usually, a gurgling noise can be heard from the boiler during attempted ignition when the condensate is blocked.