How much does it cost to fix Johnson Starley error code 47?

Typical repair cost for the Johnson Starley 47 fault is £140-220 including labour.

47 High

Johnson Starley 47 Fault Code

Q: What does the Johnson Starley 47 fault code mean?

Your boiler has stopped working because it cannot detect any information from the water pressure sensor, likely due to a wiring fault or a broken internal part.

The Johnson Starley 47 fault code means: your boiler has stopped working because it cannot detect any information from the water pressure sensor, likely due to a wiring fault or a broken internal part.. It appears on 6 Johnson Starley models in our database.

Technical description: Water pressure sensor open circuit

Typical repair cost £140-220 (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 47 fault code

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

Source

Johnson Starley 47 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