How much does it cost to fix boiler error code 38?

Typical repair cost for the boiler 38 fault is £120-220 including labour.

38 High

Boiler Fault Code 38

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 38 appears across 6 boiler brands and 49 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 working because it cannot accurately measure its own internal temperature due to a broken or disconnected sensor wire. (As reported on Viessmann Vitodens 333)

Pick your boiler brand for the 38 fix

Alpha 38 25 models Ferroli 38 3 models Halstead 38 8 models Ideal 38 1 model Viessmann 38 9 models Vokera 38 3 models

Source

Information for the 38 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