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.

Technical description

Zone 3 overheating

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

Find a Gas Safe engineer
Search the official register →

Related fault codes

7 22View →1 01View →

Related guides you might find useful

Banging / kettling / whistling noise

Each noise points to a different fault.

Read →

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →

Boiler keeps cutting out

Lockout fault with a reset-needed pattern.

Read →