We had three radiators changed and after this the boiler wouldn't fire. Now we have heating but the no hot water. We have had the Baxi man out and he said we are not covered for the problem. Which he thinks is either the cylinder (which he said may be difficult to obtain the part) or a blockage. The boiler is a Baxi Sol 0 36 HE and was installed in April 2010. Should we cut our losses and get a combi installed? if so what type of Baxi would you recommend for a 4 bedroom house? Thank you.