reasons for pressure increasing

15 Aug 2013
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United Kingdom

What are the other reasons boiler pressure gauge increase beyond the filling loop passing?

My boiler pressure constantly rises and then sits at about 3 bar. Filling loop is not passing. What are the other reasons the pressure could keep increasing? Could it be a faulty gauge?
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Have you disconnected the filling loop to eliminate passing?

Heat exchanger perforated
Expansion vessel needs recharging
thanks! the rigid filling loop was fine but then i found another older filling loop lower down the pipes and the valve was knackered on that, so i blanked it off. Thanks for your reply

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