Boiler Fault Code 7 07

Also written as 707 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code 7 07 appears across 1 boiler brand and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that the water temperature in one specific heating area of your home, known as Zone 3, has risen higher than is safe, causing the system to stop working to protect itself. (As reported on Ariston E-Combi One 30)