BoilerFaultCodesTechnical 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.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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