How much does it cost to fix boiler error code Lock Out After 15 Seconds?

Typical repair cost for the boiler Lock Out After 15 Seconds fault is £150-300 including labour.

Lock Out After 15 Seconds High

Boiler Fault Code Lock Out After 15 Seconds

Also written as LOCKOUTAFTER15SECONDS — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Lock Out After 15 Seconds appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is lighting, but it cannot confirm the flame is stable, so it shuts down for safety reasons to prevent fuel from building up. (As reported on Potterton Statesman)

Pick your boiler brand for the Lock Out After 15 Seconds fix

Potterton Lock Out After 15 Seconds 1 model

Source

Information for the Lock Out After 15 Seconds fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026