High
Insufficient water pressure on Ariston E-Combi One

Your boiler has stopped working because the water pressure inside your heating system has dropped too low to operate safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

INSUFFICIENT SYSTEM PRESSURE: In the event of insufficient water pressure in the heating system (less than 0.4 bar), a safety device will shutdown the boiler.

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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