BoilerFaultCodes 16 High
Boiler Fault Code 16
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 16 appears across 22 boiler brands and 78 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's internal computer brain has developed a critical fault and is unable to manage the system safely. (As reported on Remeha Quinta 30)
Pick your boiler brand for the 16 fix
Alpha 16 24 models Atag 16 1 model Baxi 16 3 models Biasi 16 4 models Dimplex 16 2 models Ferroli 16 4 models Firebird 16 1 model Gledhill 16 1 model Glow-worm 16 9 models Halstead 16 5 models Heatline 16 3 models Ideal 16 5 models Keston 16 1 model Malvern 16 1 model Potterton 16 1 model Remeha 16 1 model Saunier Duval 16 5 models Sime 16 1 model Unical 16 2 models Vokera 16 2 models Warmworld 16 1 model Worcester Bosch 16 1 model
Source
Information for the 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 7 July 2026