LED Flashing High

Johnson Starley LED Flashing Fault Code

Also written as LEDFLASHING — same fault.

The Johnson Starley LED Flashing fault code means: your boiler's internal fan is failing to start or power up, which means the unit cannot safely clear exhaust gases and will refuse to ignite.. It appears on 1 Johnson Starley model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: The fan is not connected, or the capacitor is not connected, or there is a short circuit in the fan supply.
Typical repair cost £180-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Johnson Starley models that show the LED Flashing fault code

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

Source

Johnson Starley LED Flashing fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.

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