how can i fix my worcester bosch greenstar 28i junior boiler?

the annoying thing about this boiler is that it wont give specific fault codes

YOU have to decipher the the sequence of flashing lights

RED and/or BLUE?
ON or OFF?
FLASHING FAST/SLOW?

even then you might only be able to narrow it down to half a dozen possible causes which would have to be individually tested to find the most likely culprit

the boiler book wont tell you HOW to test these components
you would have to ring up worcester tech support for advice

Q
August 2014