Your boiler is making loud noises because trapped air bubbles are causing the water to rattle as it circulates through your heating system.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Air in system.
DIY fix possible
Turn off your boiler and wait for the radiators to cool down completely.Use a radiator key to open the bleed valve at the top of each radiator until water flows out steadily with no hissing air.Check your boiler's pressure gauge and top it up to the manufacturer's recommended level, typically between 1 and 1.5 bar.
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A boiler cover plan would cover faults like Complaints of noise (2) — no call-out fees, no surprises.
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Chaffoteaux Flexiflame 140 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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