BoilerFaultCodes 1 Medium
Your boiler is struggling to push water around your heating system, causing it to run noisily because the water flow is being restricted.
Book a service
This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.
Technical description: Boiler noisy - On heating only: Low flow rate as result of system resistance
Typical repair cost £100-250 (including labour)
DIY fix possible
Check that all radiator valves throughout your home are fully openEnsure your system pressure is set correctly between 1 and 1.5 barBleed any trapped air from your radiators to ensure water can flow freely
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 1 — no call-out fees, no surprises.
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Chaffoteaux Sterling FF 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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