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Ravenheat gas boiler combi-pressure level?

Adjusted black marker to be level with red marker on 1 when boiler turned on for heating black marker moved to nearly 2 boiler turned off and blacker marker fallen back to 1.5. Should both black and red markers be at 1 when turned off?
John, November 2008
Red needle should be set to about a 0.5 so you know when to top up system.Black needle should sit between 1 and 1.5 when cold.When hot it may rise to as much as 2.5.This is ok.If it goes near 3 then you have a problem and will need a Corgi Engineer.

Gasman, November 2008
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