BoilerFaultCodesTechnical description
Low water pressure
What causes this fault?
This fault occurs when the internal pressure sensor detects that the system water level has dropped below the minimum safety threshold. The most common reason is a small leak in the pipework or radiators, though it can also happen if the expansion vessel has lost its air charge or the pressure sensor itself has failed.
This issue often surfaces at the start of autumn when homeowners turn their heating back on after a long summer break, exposing small leaks or pressure drops.
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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