How much does it cost to fix boiler error code E48?

Typical repair cost for the boiler E48 fault is £140-£280 including labour.

E48 High

Boiler Fault Code E48

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E48 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 the exhaust gases are getting too hot, causing the fan to run at full speed to protect the system from damage. (As reported on Vokera Condexa Pro)

Pick your boiler brand for the E48 fix

Biasi E48 1 model Johnson Starley E48 1 model Vokera E48 1 model

Source

Information for the E48 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