How much does it cost to fix Johnson Starley error code E11?

Typical repair cost for the Johnson Starley E11 fault is £120-280 including labour.

E11 High

Johnson Starley E11 Fault Code

Q: What does the Johnson Starley E11 fault code mean?

Your boiler is failing to detect the flame needed to heat your water, so it has shut down for safety.

The Johnson Starley E11 fault code means: your boiler is failing to detect the flame needed to heat your water, so it has shut down for safety.. It appears on 1 Johnson Starley model in our database.

Technical description: Flame circuit failure

Typical repair cost £120-280 (including labour)

Engineer required

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

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Johnson Starley models that show the E11 fault code

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

C10d Repair: £120-280

Source

Johnson Starley E11 fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026