E05 High

Heatline E05 Fault Code

The Heatline E05 fault code means: your boiler has detected an issue with the sensor that monitors the temperature of the water flowing to your radiators, which means it cannot safely heat your home.. It appears on 2 Heatline models 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: Central heating flow sensor fault
Typical repair cost £90-160 (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 E05 fault code

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

Source

Heatline E05 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 31 August 2026