How much does it cost to fix boiler error code 1 2 OUTDOOR SENSOR ERROR?

Typical repair cost for the boiler 1 2 OUTDOOR SENSOR ERROR fault is £90-160 including labour.

1 2 OUTDOOR SENSOR ERROR Low

Boiler Fault Code 1 2 OUTDOOR SENSOR ERROR

Also written as 12OUTDOORSENSORERROR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 1 2 OUTDOOR SENSOR ERROR appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble reading the temperature outside, which means it might not adjust your heating correctly as the weather changes. (As reported on Johnson Starley J32 System ET)

Pick your boiler brand for the 1 2 OUTDOOR SENSOR ERROR fix

Johnson Starley 1 2 OUTDOOR SENSOR ERROR 1 model

Source

Information for the 1 2 OUTDOOR SENSOR ERROR fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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