Thanks for the responses - certainly looks like it did only come with the 2 year warranty. Disappointing that part of it has failed at such a young age - the main reason I went for Vaillant is that I thought they were the best and it would give me many years of issue free service.
Martin
Hi,
I have an Vaillant ecotec plus 831 installed in Feb 2011 - installed as part of a bigger building project adding extension to house.
The diverter valve has started leaking - I have had a local heating engineer round who seems pretty sure that this boiler would have a 5 year warranty...