Low
7 13 on Ariston E-Combi One 24

Your boiler has detected a technical fault with a temperature sensor in part of your heating system, though your primary heating and hot water may still function.

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

Zone 3 return sensor defective

Engineer required

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

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Related fault codes

7 11View →7 12View →

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