There is a flashiing exclamation light on my worcester boiler 24si II

jan, July 2010

Flashing 1 per sec.

Andrea, November 2010

More information needed, is it the main blue light centre bottom of the boiler?
If so, is it off flashing on, or on flashing off?
It's seems a daft question, but I assure you there are different scenarios dependant on that answer.
Off flashing on=2 secs off 1 sec on
On flashing off=2 secs on 1 sec off

Carefree, July 2010