How much does it cost to fix Potterton error code SAFETY LOCKOUT?

Typical repair cost for the Potterton SAFETY LOCKOUT fault is £120-250 including labour.

SAFETY LOCKOUT High

Potterton SAFETY LOCKOUT Fault Code

Q: What does the Potterton SAFETY LOCKOUT fault code mean?

Your boiler has detected an internal safety issue and has shut itself down to prevent damage, meaning your heating and hot water will not work until it is reset or repaired.

Also written as SAFETYLOCKOUT — same fault.

The Potterton SAFETY LOCKOUT fault code means: your boiler has detected an internal safety issue and has shut itself down to prevent damage, meaning your heating and hot water will not work until it is reset or repaired.. It appears on 1 Potterton model in our database.

Technical description: Lockout LED flashing once a second

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 SAFETY LOCKOUT fault code

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

Performa System HE Repair: £120-250

Source

Potterton SAFETY LOCKOUT 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