BoilerFaultCodesTechnical description
Pressure too low or sensor error
What causes this fault?
This fault occurs when the water inside your central heating system drops below the minimum level required for the boiler to operate. The most common reasons are a small leak somewhere in your radiators or pipework, or air being released from the system after the radiators have been bled. Without enough water pressure, the boiler shuts down to prevent the internal heat exchanger from overheating.
This issue often appears in autumn when the heating is turned back on for the first time, as seals may have shrunk or settled during the summer months.
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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