Low system water pressure High

Ferroli Low system water pressure Fault Code

Also written as LOWSYSTEMWATERPRESSURE — same fault.

The Ferroli Low system water pressure fault code means: your boiler has stopped working because the amount of water inside your heating system has dropped below the required level.. It appears on 1 Ferroli model in our database.

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: System empty
Typical repair cost £0-£90 (including labour)

DIY fix possible

Locate the external filling loop, which is a silver braided hose with one or two small valves connecting your cold water main to your heating pipes.Open the valve(s) slowly and watch the pressure gauge on the front of the boiler until the needle reaches the green zone, typically between 1.0 and 1.5 bar.Close the valve(s) tightly to prevent over-pressurizing the system.

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Ferroli models that show the Low system water pressure fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ferroli Low system water pressure fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

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