BoilerFaultCodesYour boiler is failing to keep its small pilot flame burning, which means it cannot fire up to provide heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: PILOT WILL NOT STAY LIT WHEN THE GAS VALVE BUTTON IS RELEASED
What causes this fault?
This fault occurs when the boiler's safety monitoring system fails to detect a constant pilot flame, causing it to shut down gas flow for safety. The most common reason is a worn-out thermocouple or a faulty overheat thermostat that is incorrectly sensing that the boiler is getting too hot.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 52 — no call-out fees, no surprises.
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