How much does it cost to fix Potterton error code Lockout (Red) light on?

Typical repair cost for the Potterton Lockout (Red) light on fault is £120-250 including labour.

Lockout (Red) light on High

Potterton Lockout (Red) light on Fault Code

Q: What does the Potterton Lockout (Red) light on fault code mean?

Your boiler has stopped working because it couldn't light the flame, which means your heating and hot water will not turn on.

Also written as LOCKOUTREDLIGHTON — same fault.

The Potterton Lockout (Red) light on fault code means: your boiler has stopped working because it couldn't light the flame, which means your heating and hot water will not turn on.. It appears on 1 Potterton model in our database.

Technical description: Ignition Lockout - boiler failed to light after five attempts

Typical repair cost £120-250 (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 Lockout (Red) light on fault code

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

Performa SL HE 9 2 Repair: £120-250

Source

Potterton Lockout (Red) light on 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