IDEAL BOILER Ongoing Problems 'L9' Error

Hello,

We are having problems with our Ideal Boiler, which appears to be overheating and displaying the 'L9' error - basically it has a mind of it's own and just decides to stop working at any given time, leaving us with no heating or hot water. It does not re-start itself after pushing the re-set button, or when turning it off at the mains! It will simply come back on after a couple of hours (seems like it is cooling itself down).....

This boiler is only 3 years old (new developement) and we have been having these problems for sometime. Obviously when under warrany we had local & manufactuers engineers out and even though they did do something (drained rad's etc) they did not fix the problem, as it is still happening!!

We are after some advice firstly to see if anyone has any suggestions about what the 'ongoing' problem might be and secondly does anyone have any idea where we stand with the fact that this is an 'ongoing' problem (that was looked at several times under warranty & never fixed) but now 'they' are asking us to pay for all future visits - even though its the same error and it clearly was not fixed!

Any help or suggestions would really be appreciated.

Kind regards
HN15