Central Heating LED flashing High

Heatline Central Heating LED flashing Fault Code

Also written as CENTRALHEATINGLEDFLASHING — same fault.

The Heatline Central Heating LED flashing fault code means: your boiler has lost the ability to accurately measure the temperature of the water being sent to your radiators, so it has shut down to prevent the system from getting too hot.. It appears on 1 Heatline 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: Fault on Central Heating NTC (10-12 kohms @ 20 ºC)
Typical repair cost £120-200 (including labour)

Engineer required

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

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Heatline models that show the Central Heating LED flashing fault code

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

Source

Heatline Central Heating LED flashing fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026