BoilerFaultCodes Test 2 High
Boiler Fault Code Test 2
Also written as TEST2 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Test 2 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 is unable to move the water around the system, which means it cannot heat your home or provide hot water. (As reported on Vokera Hydra)
Pick your boiler brand for the Test 2 fix
Source
Information for the Test 2 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 27 April 2026