How much does it cost to fix Ferroli error code LED 5?

Typical repair cost for the Ferroli LED 5 fault is £80-120 including labour.

LED 5 High

Ferroli LED 5 Fault Code

Q: What does the Ferroli LED 5 fault code mean?

Your boiler has detected that the water pressure inside the system has dropped too low for it to operate safely, meaning your heating and hot water will not turn on.

Also written as LED5 — same fault.

The Ferroli LED 5 fault code means: your boiler has detected that the water pressure inside the system has dropped too low for it to operate safely, meaning your heating and hot water will not turn on.. It appears on 5 Ferroli models in our database.

Technical description: Low water pressure switch - WARNING

Typical repair cost £80-120 (including labour)

DIY fix possible

Locate the filling loop, which is usually a flexible silver hose with one or two small valves connecting your boiler or nearby pipework.Open the valve(s) slowly to allow mains water into the system until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.Close the valve(s) tightly and check that the fault light has cleared.

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Ferroli models that show the LED 5 fault code

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

Source

Ferroli LED 5 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