Heatline E11 Fault Code
The Heatline E11 fault code means: your boiler has stopped working because water is not moving through the system properly, which is causing the unit to get too hot too quickly.. It appears on 2 Heatline models in our database.
Technical description: Pump circulation fault: Insufficient water movement detected or primary flow and return temperature difference is too high.
DIY fix possible
Check that your boiler pressure is between 1.0 and 1.5 bar on the gauge.Ensure all radiator valves are fully open to allow water to flow.Check if any radiators need bleeding to remove trapped air.
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Gas Safe Register →Heatline models that show the E11 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Heatline E11 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