Low
OUTDR on Grant Vortex Blue

Your boiler is struggling to work out the weather outside because the external temperature sensor has lost its connection or stopped working.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Outdoor sensor short / Outdoor sensor open

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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