How much does it cost to fix Ferroli error code Low water pressure light ON?

Typical repair cost for the Ferroli Low water pressure light ON fault is £80-150 including labour.

Low water pressure light ON High

Ferroli Low water pressure light ON Fault Code

Q: What does the Ferroli Low water pressure light ON fault code mean?

Your boiler has stopped working because the water pressure inside the system has dropped too low, which is causing it to lock itself to prevent damage.

Also written as LOWWATERPRESSURELIGHTON — same fault.

The Ferroli Low water pressure light ON fault code means: your boiler has stopped working because the water pressure inside the system has dropped too low, which is causing it to lock itself to prevent damage.. It appears on 4 Ferroli models in our database.

Technical description: Water pressure below 1 bar or faulty low water pressure switch

Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the filling loop (a silver flexi-hose) underneath your boiler.Open the valves attached to the loop until you hear water flowing.Watch the pressure gauge on the front of the boiler until the needle reaches between 1 and 1.5 bar.Firmly close the valves to stop the flow.

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Ferroli models that show the Low water pressure light ON fault code

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

Source

Ferroli Low water pressure light ON 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