BoilerFaultCodesYour boiler is making loud banging or whistling noises because the water supply valves under the unit haven't been turned fully on, restricting the flow.
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 - Isolating valves not fully open
DIY fix possible
Locate the isolating valves on the pipework underneath your boiler.Check that the handles for the water supply are rotated to be fully parallel with the pipework.Turn the boiler off and back on again to clear the fault.
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 7 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
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.
Affiliate links — we may earn a commission at no extra cost to you.