How much does it cost to fix boiler error code GTV90?

Typical repair cost for the boiler GTV90 fault is £150-300 including labour.

GTV90 Emergency

Boiler Fault Code GTV90

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code GTV90 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's outdoor exhaust vent has likely become blocked, damaged, or disconnected, preventing the safe escape of exhaust gases. (As reported on Grant Vortex)

Pick your boiler brand for the GTV90 fix

Grant GTV90 1 model

Source

Information for the GTV90 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