BoilerFaultCodesTechnical description
System pressure too low
What causes this fault?
This fault occurs when the internal water pressure drops below the minimum level required for the boiler to operate safely. The most common reasons are a slow leak from a radiator valve or pipework, or the air being released from the system through recent bleeding of the radiators.
This fault is frequently seen in autumn when homeowners turn their heating back on for the first time after summer, revealing pressure drops or small leaks that developed while the system was idle.
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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