How much does it cost to fix Ferroli error code LED 5 red (1) [DHW mode]?

Typical repair cost for the Ferroli LED 5 red (1) [DHW mode] fault is £250-400 including labour.

LED 5 red (1) [DHW mode] High

Ferroli LED 5 red (1) [DHW mode] Fault Code

Q: What does the Ferroli LED 5 red (1) [DHW mode] fault code mean?

Your boiler has detected an internal computer error and is currently unable to start, meaning you will likely have no hot water or heating.

Also written as LED5RED1DHWMODE — same fault.

The Ferroli LED 5 red (1) [DHW mode] fault code means: your boiler has detected an internal computer error and is currently unable to start, meaning you will likely have no hot water or heating.. It appears on 2 Ferroli models in our database.

Technical description: Waiting time operating: replace P.C.B.

Typical repair cost £250-400 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ferroli models that show the LED 5 red (1) [DHW mode] fault code

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

Source

Ferroli LED 5 red (1) [DHW mode] 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