A quote for a boiler is just that. It won’t cover other stuff.Thanks so much for your replies. The OP is in their 60's so not sure if that's classed as old. The consensus of opinion seems to be to leave the old boiler in place until it stops or starts costing too much. The issue with this that I didn't mention is that the current flue and parts of the inside of the boiler apparently contain asbestos. In the case of the flue I believe it's a very diluted form of asbestos which I've researched. If this boiler contains some asbestos I'm guessing most others of that vintage will too, so should they all be condemned ? I hadn't really thought about replacing the boiler could mean replacing the whole system. If I get a quote to replace the boiler and agree, will that cover me for any problems that may occur with the old rads etc. Thank you again for your very helpful replies.
I wouldn’t use someone who just quotes for the boiler without at least discussing the other issues you’re highly likely to come across.
If you don’t improve/upgrade other aspects of the system, you could kill your new boiler prematurely.
I’ve seen brand new boilers dead in 3 years even after a powerflush and magnetic filter fitted.