Water is dripping out of the water to water heat exchanger 8716142903 in my worcester 28CDi boiler. How do I replace this? Is it fairly easy or best left to a qualified person?

Tony Spencer, April 2008

Im a gas engineer and have replaced many of these before you have 3 nuts on the back and 1 screw on the right securing a clip in place isolate the cold mains coming in and the flow and return valves drain water from boiler drain point and re assemble in reverse order fairly simple should take about 30-40 minutes

Daniel, April 2008