Thank you for the reply. A quick update, after ringing up the emergency cover on my bank account an engineer was sent out.
He had a quick look (basically 10 mins tops) and said it could be the PCB and would probably cost £80 to £300 and would ring me on Tuesday confirm to order the new part...
I have a problem with my central heating. The boiler is a Halstead ACE HE 24 and the problem is that the error code keeps flashing number 3, I have tried to reset the boiler on numerous occasions and the error keeps flashing number 3.
Does anyone know what the problem could be? Could it be...