How much does it cost to fix Navien error code 760?

Typical repair cost for the Navien 760 fault is £100-180 including labour.

760 Low

Navien 760 Fault Code

Q: What does the Navien 760 fault code mean?

Your boiler has reached its programmed service timer and is simply reminding you that it is time to have a professional technician perform a routine maintenance check to prevent limescale buildup.

The Navien 760 fault code means: your boiler has reached its programmed service timer and is simply reminding you that it is time to have a professional technician perform a routine maintenance check to prevent limescale buildup.. It appears on 6 Navien models in our database.

Technical description: Lime Alarm: Displays when the set time period has been reached to indicate a flush or service is necessary.

Typical repair cost £100-180 (including labour)

Engineer required

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

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Navien models that show the 760 fault code

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

Source

Navien 760 fault code information on this page is sourced and cross-checked against the official Navien service / installation manuals for each affected model.

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