E78-180 Emergency

Potterton E78-180 Fault Code

Also written as E78180 — same fault.

The Potterton E78-180 fault code means: your boiler has detected that exhaust gases are not escaping correctly through the flue, which is a safety mechanism to prevent dangerous fumes 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: Products Discharge Safety Device - TTB CFL40, 50 (Blue sleeve)
Typical repair cost £150-300 (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 E78-180 fault code

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

Source

Potterton E78-180 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 7 July 2026