TTB Trip Emergency

Potterton TTB Trip Fault Code

Also written as TTBTRIP — same fault.

The Potterton TTB Trip fault code means: 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.. It appears on 1 Potterton model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: This device is a safety feature... If the unit continues to trip then the flue should be checked for spillage.
Typical repair cost £150-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Potterton models that show the TTB Trip fault code

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

Source

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

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