How much does it cost to fix Potterton error code Locks Out In Morning Only?

Typical repair cost for the Potterton Locks Out In Morning Only fault is £150-300 including labour.

Locks Out In Morning Only High

Potterton Locks Out In Morning Only Fault Code

Q: What does the Potterton Locks Out In Morning Only fault code mean?

Your boiler is struggling to ignite when it first wakes up in the morning, likely because it is having trouble breathing or moving water correctly.

Also written as LOCKSOUTINMORNINGONLY — same fault.

The Potterton Locks Out In Morning Only fault code means: your boiler is struggling to ignite when it first wakes up in the morning, likely because it is having trouble breathing or moving water correctly.. It appears on 1 Potterton model in our database.

Technical description: Check Combustion air setting, Air in system, Faulty non return valve

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 Locks Out In Morning Only fault code

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

Statesman Repair: £150-300

Source

Potterton Locks Out In Morning Only 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