this was supposed to be serviced every year, dyson told us they were going to service it but did'ent turn up, warranty runs out in December
Well, my gut feelings were right. Somehow, just somehow, I was convinced you haven't serviced the boiler since it was installed. In as much as I communicate with my customers (for whom I have installed boilers) that a service is due, sending them reminders, a few choose not to respond????
In your case, it's just unfortunate but chances are Ideal will not honour the warranty if boiler hasn't been serviced. Worcester Bosch would have. I'm not a fan of WB, but big boys like them go out of their way to 'make the peace'.