How much does it cost to fix boiler error code OTER?

Typical repair cost for the boiler OTER fault is £120-250 including labour.

OTER Medium

Boiler Fault Code OTER

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code OTER appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having a communication breakdown with its external thermostat or smart control system, meaning it doesn't know when to turn on or off. (As reported on Vokera Vision Plus 35C/40C)

Pick your boiler brand for the OTER fix

Vokera OTER 3 models

Source

Information for the OTER fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026