Had this boiler fitted in my new build just over three years ago. Already had the PCB replaced as it failed although IDEAL did refund me. However, the LCD panel now flashes up an L-F warning and I struggle to reset it. I have now had three heating engineers out who have cleared the condensate pipe, replaced the ignition elctrode, fire detection electrode and spark generator. It is still breaking down with the same fault. Nobody is able to seem to find the problem and to date it has cost me £297, any suggestions.