Boiler report problems?

[Nigel Davies]

Hi

I am potentially buying a house but the below has been written on an inspection carried out on the boiler.

"Boiler not fitted to manufacturers instructions.
Open vent boiler installed on a pressurised system.
Flue twisted and allowing rainwater ingress and pump not wired to boiler circumventing the boilers purge and post circulation functions."

How serious is this and will it be costly to put right?

Thanks