Any help would be much appreciated. We have moved into a house with an Ideal Icos boiler, ever since we've required heat, i.e since november we've had problems with the central heating and hot water. The boiler fires up when required but before the radiators reach temp it cuts out and flashes H to E, so our radiators rarely reaches thermostat temp and it never maintains that temp if it does reach it. We also have inconsistent water temp, sometimes hottish but never hot enough, sometimes just lukewarm. We have had a plumber out who has changed the pipes to wider pipes and has changed the thermostat but this has stillnot solved the problem. Any ideas?
Thank you for your reply.
I followed your instructions and the boiler was still flashing H to E after switching the boiler back on so this means I need a new PC Board. Is this something a novice can do and do I have to get the board direct from the manufacturers?
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