How much does it cost to fix boiler error code Insufficient System Pressure?

Typical repair cost for the boiler Insufficient System Pressure fault is £80-150 including labour.

Insufficient System Pressure High

Boiler Fault Code Insufficient System Pressure

Also written as INSUFFICIENTSYSTEMPRESSURE — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Insufficient System Pressure appears across 2 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has switched itself off because the water level inside your central heating system is currently too low for it to operate safely. (As reported on Ariston Egis 24 MFFI)

Pick your boiler brand for the Insufficient System Pressure fix

Ariston Insufficient System Pressure 2 models Ferroli Insufficient System Pressure 3 models

Source

Information for the Insufficient System Pressure fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026