179 Medium

ECA 179 Fault Code

The ECA 179 fault code means: your boiler's secondary heating zone has reached an unsafe temperature and has shut down to prevent damage.. It appears on 1 ECA model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: Heating circuit 2 temperature limiter
Typical repair cost £120-250 (including labour)

DIY fix possible

Check that all radiator valves in the second heating zone are fully openEnsure there are no blockages or trapped air by bleeding the radiators in that zoneCheck your system pressure gauge is between 1.0 and 1.5 barReset the boiler using the power button or reset dial

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ECA models that show the 179 fault code

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

Source

ECA 179 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026