BoilerFaultCodesTechnical description
Water pressure too low (< 0.6 bar)
What causes this fault?
This fault occurs when there isn't enough water circulating through your heating system to allow the boiler to fire up safely. The most common reason is a slow leak from a radiator valve or joint, though pressure can also drop if you have recently bled your radiators and haven't topped the system back up.
This fault is more common in autumn when homeowners turn their heating back on for the first time after summer, revealing pressure drops that occurred 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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