I have a combination boiler(Halstead Finest platinum)
Shower goes cold after 1 min
I have checked the heater matrix and cleaned out as this was a problem before with a build up of limescale.
This time it has not worked and now the boiler wont fire goes straight to red light .
could there be anything else related to this
The boiler is 5 years old

RobGav, May 2010