Low
Outside sensor on Ideal Concord Cxdi

Your boiler is struggling because it cannot detect the current outside temperature, so it may not adjust your heating levels correctly.

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

The control has diagnosed a fault with the outside sensor (if fitted).

From this model's manual
Verified against the Ideal Concord Cxdi 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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