BoilerFaultCodesYour boiler is making loud noises because the water pressure inside your heating system has dropped too low to operate correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Boiler noisy - Low pressure in sealed system
DIY fix possible
Locate the external filling loop, which is a silver braided hose with one or two valves located underneath your boiler.Gradually open the valve(s) to allow mains water into the system while watching the pressure gauge on the front panel.Stop filling once the needle reaches the green zone, typically between 1.0 and 1.5 bar, and ensure the valves are fully closed.
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A boiler cover plan would cover faults like 2a — no call-out fees, no surprises.
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Chaffoteaux Celtic 2 24 Rsc is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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