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how do I replace 9/14cbi leaking heatexchanger?

Do I need to make any solder joints or will it be just undo and replace and reconnect.
Worcester Bosch 9/14CBi boiler 4 years old.
Peter Saunders, December 2007
no soldered joints required just bolts and gaskets to be replaced.

Steve, December 2007
link Click here to see other fixes for Worcester.