BoilerFaultCodesTechnical description
Indicates 0 bar pressure in the system on the display
What causes this fault?
This fault occurs when the water level inside your central heating system drops too low for the boiler to operate safely. It is usually caused by a small leak in the pipework or radiators, or because air was recently bled from the system without being topped back up.
This issue is more common in autumn when homeowners turn their heating back on for the first time, exposing small leaks or air pockets that developed over the summer.
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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