17.0 High

Boiler Fault Code 17.0

Also written as 170 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 17.0 appears across 1 boiler brand and 1 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 incorrect internal gas pressure, which means it cannot safely ignite or heat your water. (As reported on Glow-worm EnergySaver)

Pick your boiler brand for the 17.0 fix

Glow-worm 17.0 1 model

Source

Information for the 17.0 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 7 July 2026