Boiler Fault Code 1 16

Also written as 116 — same fault.

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

Fault code 1 16 appears across 1 boiler brand and 12 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped heating because the external temperature control device, typically a thermostat wired to the flooring heat system, is not communicating with or is disconnected from the boiler. (As reported on Ariston E-Combi Evo)