BoilerFaultCodesYour boiler has detected that the water pressure is too low to operate safely and has shut down to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Low water pressure. Fill central heating system, pressure 0.7bar min.
What causes this fault?
This fault occurs when the water inside your heating system drops below the minimum level required for the boiler to heat up safely. The most common reasons for this are a leak somewhere in your radiator pipework or the water expansion vessel losing its internal air pressure over time.
This issue often appears in autumn when the heating is turned on for the first time after summer, as stagnant joints may have developed small weeps or leaks.
DIY fix possible
Locate the filling loop, which is usually a silver flexible hose with two small valves.Slowly open both valves to allow fresh water into the system.Watch the pressure gauge and close both valves tightly once it reaches between 1.0 and 1.5 bar.
Find a Gas Safe engineer
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