Our central heating Boiler was getting its annual service, the Engineer told me that my boiler is no longer being produced and it might be hard to get replacement parts in a few years time (my boiler is vokera linea and is about 12 years old)He said that our boiler was a combi boiler and most new boilers were condenser boilers nowadays – what exactly is a condenser boiler and how is it different from a combi boiler ???
You were given false information and he is probably doing it to persuade you to order a new boiler from him. My daughter has just had a new combi boiler installed and it is also a condenser. It doesn't matter whether it's a straight boiler or a combi, it can still have the right technology installed to make it a condenser. As this guy has given you false information you should get rid and find another guy who is more honest. My next move would be to take into account that most boilers have a life of around 15 years and start to put some money aside for when you may need a new boiler in around four years time.
A 'combi' boiiler is a dual puropose unit that can provide heating use and also potable water. You don't need a tank water heater with a combie. Never the less, all combies are condensing boilers.