Low
E 15 on Chaffoteaux Talia Green System

Your boiler is struggling to read the outdoor temperature correctly because the cable connected to the external weather sensor is likely damaged or loose.

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.

What the manual says

Manufacturer manual

Outdoor sensor open circuit (where fitted)

From this model's manual
Verified against the Chaffoteaux Talia Green System installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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