How much does it cost to fix Heatline error code E09?

Typical repair cost for the Heatline E09 fault is £0-160 including labour.

E09 High

Heatline E09 Fault Code

Q: What does the Heatline E09 fault code mean?

Your boiler has detected that the water pressure is too low, causing the system to shut down for safety.

The Heatline E09 fault code means: your boiler has detected that the water pressure is too low, causing the system to shut down for safety.. It appears on 2 Heatline models in our database.

Technical description: Water pressure fault

Typical repair cost £0-160 (including labour)

DIY fix possible

Locate the filling loop (a flexible silver hose) underneath the boiler.Slowly open the one or two taps on the loop until you hear water entering the system.Watch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar.

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Heatline models that show the E09 fault code

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

Source

Heatline E09 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