My Combi Boiler wont ignite?

We have a B&Q White Star combi boiler and when we turn the heating on you hear the boiler kicks in but then the orange light comes on indicating that there is no gas flow even though the actual gas meter reads as money being on it......?????? HELP??????
Chris, March 2005


done
SOUNDS LIKE AIR PRESURE SWITCH NOT ACTIVATING GAS VALVE CHECK FAN RUNNING ALSO SWITCH

STEVE BH HEATING, March 2005