False Flame Fault High

Potterton False Flame Fault Fault Code

Also written as FALSEFLAMEFAULT — same fault.

The Potterton False Flame Fault fault code means: your boiler thinks a flame is present when it shouldn't be, causing the system to shut down for safety purposes.. It appears on 2 Potterton models 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: Automatic Lockout. A flame is detected before an ignition attempt or unstable flame during run period.

What causes the Potterton False Flame Fault fault?

This fault occurs when the boiler's control system detects an electrical signal from the burner even though it hasn't commanded the gas to ignite yet. The most common reasons are a contaminated flame sensor sending a rogue signal, a gas valve that is leaking slightly, or a fault within the main circuit board that is misinterpreting electrical noise as a flame.

Typical repair cost £120-280 (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 False Flame Fault fault code

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

Source

Potterton False Flame Fault 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