[quote="ptg1174"]hi my central heating wont switch on i have a combi boiler (gloworm) the hot water works ok but when i switch heating on the boiler wont light and no heating
if the pressure is to low the boiler will not work on hot water as well heating.
trv's... wether thay are on or off this will not cause the boiler not to fire up for heating.
providing the room stat / programer is ok it does point towords a diverter valve problem
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