How much does it cost to fix boiler error code D.041?

Typical repair cost for the boiler D.041 fault is £120-250 including labour.

D.041 Medium

Boiler Fault Code D.041

Also written as D041 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code D.041 appears across 1 boiler brand and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to detect the temperature of the water coming back into the system, which can cause it to stop working correctly or shut down to protect itself. (As reported on Vaillant ecoTEC Plus 836)

Pick your boiler brand for the D.041 fix

Vaillant D.041 7 models

Source

Information for the D.041 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