ive got the same boiler, its worth double checking both inlet and outlet valves are open under the bolier. If they are what happens when you turn the central heating on. if it fires up and starts pumping and heating maybe the fault is within the deversion valve. if the boiler is a couple of years old and there is sludge or dirt in the pipes it is common for it to block the valve up in this model. flush the system, swop the valve and put inhibitor in and all should be good.
if boiler doesnt start up what happens?
Steve Mann, November 2006
