How much does it cost to fix boiler error code Section D Fault?

Typical repair cost for the boiler Section D Fault fault is £120-220 including labour.

Section D Fault High

Boiler Fault Code Section D Fault

Also written as SECTIONDFAULT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Section D Fault appears across 1 boiler brand and 1 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 monitor its temperature because a sensor has stopped working, meaning it cannot safely provide heating or hot water. (As reported on Potterton Performa 28i)

Pick your boiler brand for the Section D Fault fix

Potterton Section D Fault 1 model

Source

Information for the Section D Fault 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