Low
E 15 on Chaffoteaux Minima HE

Your boiler is struggling to detect the outside temperature because the connection to the external weather sensor is disconnected or faulty.

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 open circuit (where fitted)

Engineer required

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

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