BoilerFaultCodesYour boiler has stopped working because it cannot detect enough water pressure inside the system to operate safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No main burner - No water
DIY fix possible
Locate your boiler's filling loop (the silver braided hose under the unit)Slowly open the valves on the loop to let water into the systemWatch the pressure gauge on the front until the needle reaches 1.5 bar, then securely close the valves
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 6.iii — 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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