How much does it cost to fix Heatline error code Central Heating LED flashing?

Typical repair cost for the Heatline Central Heating LED flashing fault is £120-200 including labour.

Central Heating LED flashing High

Heatline Central Heating LED flashing Fault Code

Q: What does the Heatline Central Heating LED flashing fault code mean?

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.

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 2 Heatline models in our database.

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 27 April 2026