13 High

Boiler Fault Code 13

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 13 appears across 30 boiler brands and 119 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 a problem with its primary temperature sensor and has shut down as a safety precaution to prevent overheating. (As reported on Intergas Rapid 25 32)

Pick your boiler brand for the 13 fix

Alpha 13 3 models Ariston 13 6 models Atag 13 1 model Atmos 13 4 models Baxi 13 10 models Biasi 13 4 models Chaffoteaux 13 3 models Daikin 13 3 models Dimplex 13 2 models Ferroli 13 4 models Firebird 13 1 model Gledhill 13 1 model Glow-worm 13 11 models Grant 13 1 model Halstead 13 5 models Heatline 13 3 models Ideal 13 8 models Intergas 13 11 models Johnson Starley 13 5 models Maxol 13 1 model Myson 13 1 model Potterton 13 2 models Remeha 13 4 models Saunier Duval 13 9 models Sime 13 3 models Unical 13 2 models Vaillant 13 2 models Viessmann 13 1 model Vokera 13 6 models Worcester Bosch 13 2 models

Source

Information for the 13 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