Worcester Bosch Greenstar 28i Junior Syphon/Condensate Trap Blocked Problem

No hot water, checking the boiler and I can see that the reset light is flashing as is the blue status light from off to on.
Resetting the boiler by holding down the button turns it back on but the boiler will start making loud banging noises as if its about to take off and then clunk and turns itself off with the lights flashing again.