ER 07 + SPANNER Medium

Johnson Starley ER 07 + SPANNER Fault Code

Also written as ER07SPANNER — same fault.

The Johnson Starley ER 07 + SPANNER fault code means: your boiler has detected an issue with the sensor that measures hot water temperature, which means you may not have reliable hot water for your taps and showers.. It appears on 1 Johnson Starley model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: DHW flow temp sensor out of range
Typical repair cost £100-180 (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 ER 07 + SPANNER fault code

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

Source

Johnson Starley ER 07 + SPANNER 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