Boiler Fault Code 1 0 6

Also written as 106 — same fault.

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

Fault code 1 0 6 appears across 1 boiler brand and 1 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 flow through your central heating system is too slow or blocked, so it has shut down to protect itself from overheating. (As reported on Ariston HS Premium)