Fault on Fan or Flue High

Potterton Fault on Fan or Flue Fault Code

Also written as FAULTONFANORFLUE — same fault.

The Potterton Fault on Fan or Flue fault code means: your boiler is struggling to breathe safely, meaning it cannot clear away exhaust gases effectively and has shut down to prevent any risk.. It appears on 1 Potterton model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Indicates that the flue or flue terminal is blocked or obstructed in some way, or that there is an internal fault.
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 Fault on Fan or Flue fault code

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

Source

Potterton Fault on Fan or Flue 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