ER 04 + SPANNER High

Johnson Starley ER 04 + SPANNER Fault Code

Also written as ER04SPANNER — same fault.

The Johnson Starley ER 04 + SPANNER fault code means: your boiler has stopped working because the water inside it is not moving around properly to heat your home.. It appears on 1 Johnson Starley model 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: No circulation
Typical repair cost £120-£350 (including labour)

DIY fix possible

Check that your radiators are turned on and the valves are open.Ensure there is enough water pressure in the system by checking the gauge.Gently bleed your radiators to remove any trapped air that might be blocking the flow.

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Johnson Starley models that show the ER 04 + SPANNER fault code

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

Source

Johnson Starley ER 04 + 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