How much does it cost to fix boiler error code Outside Sensor Fault?

Typical repair cost for the boiler Outside Sensor Fault fault is £90-160 including labour.

Outside Sensor Fault Low

Boiler Fault Code Outside Sensor Fault

Also written as OUTSIDESENSORFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code Outside Sensor Fault appears across 2 boiler brands and 16 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has lost connection with the sensor that measures the temperature outside, meaning it may not heat your home as efficiently as usual. (As reported on Ideal Logic Max Heat 2)

Pick your boiler brand for the Outside Sensor Fault fix

Ideal Outside Sensor Fault 9 models Keston Outside Sensor Fault 7 models

Source

Information for the Outside Sensor Fault 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 31 August 2026