I have a Baxi Solo 18HE boiler that over the past few weeks has been increasingly locking out (red light on) so that the reset button has to be pressed to fire the thing back up again, it is happening almose daily now. In the main, once the reset button has been pressed, the boiler will fire up without problem. Interestingly when the boiler does fire up, it does so with a surprisingly loud 'thump'. Does anybody have any idea what the fault maybe? I must admit it is a little overdue for a service and I hope this is all thats required.
Thanks in advance
Thanks in advance