Medium
7 23 on Ariston E-Combi One 24

Your boiler has detected that the water in the third heating area of your home is getting too hot and has shut down to protect itself.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Zone 3 overheating

From this model's manual
Verified against the Ariston E Combi One 24 installation & service manual, page 39.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check that all radiator valves in Zone 3 are fully openEnsure the heating zone valves are not stuck in the closed positionCheck if the pump for that specific zone is running

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