worcester bosch junior 28i condensing boiler- blue light?

Hi its christmas day and the boiler wont light it a worcester bosch junior 28i condensing boiler the condensating pipe is clear the copper pipe going outside is clear ... when i press reset switch the valve on the right hand side clicks and moves up and down the pump runs but nothing else the fan on the top right hand side remains still .... about 30secs later the blue light comes back on flashing but not the fault light (red one).....any ideas ?? its possible the copper overflow pipe was blocked but ive cleared this... removed it as well just to be sure same as the condensate pipe.....