I bought a house one year ago with a gloworm compact 100e combi boiler. It was installed in Oct 2000. Its been trouble free up to now. The other day I could not get hot water from the taps (central heating ok) so called a plumber. He has advised me that the heat exchanger is blocked and will need replacing. With a service and labour I am looking at @£350. My question is how much life can I expect out of this type of boiler. Will I now be chasing good money after bad (maybe the pump will go next week) and would I be better off spending money on a new boiler now like a veissmans condensing boiler. He can do it with a five year guarantee.