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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.
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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
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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
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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.
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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
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Flashing S AND E Service Interval Timer
- Please contact the installer
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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
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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:
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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:
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
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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/garglign 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 1 Low Pressure
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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.
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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
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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:
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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
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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
