Hi I have the above combi installed and have just had to change a radiator in the bathroom, of course I've now lost the pressure in the combi so went to re-pressurize by turning the valve underneath.

Problem is it gives a quarter turn then jumps, spring loaded as though its supposed t do this. Please help

GARY, August 2009

you are turning the prssure relief valve by the sound of things, leave it alone. on your boiler there should be, on the right had underside, 2 small quarter turn taps connected by a small pipe. open them one at a time until the pressure rises. either that or you should have a hose connecting the return and cold water supply pipe.

Ian, August 2009