How much does it cost to fix boiler error code TTB Trip?

Typical repair cost for the boiler TTB Trip fault is £150-350 including labour.

TTB Trip Emergency

Boiler Fault Code TTB Trip

Also written as TTBTRIP — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code TTB Trip 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 that hot exhaust fumes are not escaping properly through the flue and has switched itself off to prevent poisonous gases from entering your home. (As reported on Potterton Osprey CF 125)

Pick your boiler brand for the TTB Trip fix

Potterton TTB Trip 1 model

Source

Information for the TTB Trip 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