FLUE TEMPERATURE SENOR LOCKOUT High

Johnson Starley FLUE TEMPERATURE SENOR LOCKOUT Fault Code

Q: What does the Johnson Starley FLUE TEMPERATURE SENOR LOCKOUT fault code mean?

Your boiler has shut itself down as a safety precaution because it detected that the exhaust gases are becoming too hot.

Q: How much does it cost to fix Johnson Starley error code FLUE TEMPERATURE SENOR LOCKOUT?

Typical repair cost for the Johnson Starley FLUE TEMPERATURE SENOR LOCKOUT fault is £120-250 including labour.

Also written as FLUETEMPERATURESENORLOCKOUT — same fault.

The Johnson Starley FLUE TEMPERATURE SENOR LOCKOUT fault code means: your boiler has shut itself down as a safety precaution because it detected that the exhaust gases are becoming too hot.. It appears on 1 Johnson Starley model in our database.

Technical description: Flue temperature sensor lockout

Typical repair cost £120-250 (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 FLUE TEMPERATURE SENOR LOCKOUT fault code

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

J32 System ET Repair: £120-250

Source

Johnson Starley FLUE TEMPERATURE SENOR LOCKOUT 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