the red light on the boiler is on indicating low pressure system. the radiator is off and when it was on the boiler makes loud noise constantly. what can i do?
You need to re-pressurise the system.
Refill via filling loop to approx 1 to 1.5 bar.
Red light will go out.
May have to bleed rads after to get rid of any air within them.
Paul
March 2008
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