How much does it cost to fix boiler error code 016?

Typical repair cost for the boiler 016 fault is £180-350 including labour.

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Boiler Fault Code 016

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 016 appears across 2 boiler brands and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected an issue related to the flow of water or heat exchange, often caused by a buildup of debris or a sensor struggling to track the water movement. (As reported on Navien NCB)

Pick your boiler brand for the 016 fix

Ideal 016 1 model Navien 016 7 models

Source

Information for the 016 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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