How much does it cost to fix boiler error code Er 16?

Typical repair cost for the boiler Er 16 fault is £100-£200 including labour.

Er 16 High

Boiler Fault Code Er 16

Also written as ER16 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code Er 16 appears across 3 boiler brands 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 has detected that two temperature sensors may have been wired into the wrong places or the internal water pump has been installed incorrectly. (As reported on Biasi Activ A)

Pick your boiler brand for the Er 16 fix

Biasi Er 16 1 model Johnson Starley Er 16 1 model Vaillant Er 16 1 model

Source

Information for the Er 16 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 31 August 2026