Your boiler has detected that the water pressure inside the heating system is too low 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 water in the primary circuit
DIY fix possible
Locate the filling loop, which is usually a silver braided hose under the boiler connected to two valves.Open the valves slowly to allow water to enter the system until the pressure gauge reads between 1.0 and 1.5 bar.Close the valves firmly and check to ensure the pressure is stable.
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 E 08 — no call-out fees, no surprises.
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Chaffoteaux Minima HE 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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