my 28i greenstar junior boiler condense froze i have cut the pipe and released the water the boiler then ran after about 25mins it locked out the red light flashes 1 per second and the blue light 1 per 2 seconds after 15 mins of being locked out it seems to reset and start again i have noticed seems ok on heating but after runnin hot water for a while seems to lock out again but you can here the pump still running and the hot water is extremly hot?
DAVE, December 2010