How much does it cost to fix boiler error code 48?

Typical repair cost for the boiler 48 fault is £120-220 including labour.

48 High

Boiler Fault Code 48

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 48 appears across 3 boiler brands and 11 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped heating your hot water because it can no longer detect the temperature of your hot water cylinder. (As reported on Viessmann Vitodens 200)

Pick your boiler brand for the 48 fix

Ideal 48 1 model Viessmann 48 9 models Vokera 48 1 model

Source

Information for the 48 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