Boiler Fault Code Er 14 +

Also written as ER14 — same fault.

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

Fault code Er 14 + appears across 3 boiler brands and 5 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 water isn't moving through the system properly or there is a lack of water pressure, causing it to overheat and lock itself for 10 minutes. (As reported on Biasi Advance 25C)