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

Typical repair cost for the boiler Section K fault is £180-350 including labour.

Section K High

Boiler Fault Code Section K

Also written as SECTIONK — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Section K appears across 2 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's main control dial or internal computer has developed a fault, meaning the system cannot correctly process a reset command or switch between modes. (As reported on Baxi System)

Pick your boiler brand for the Section K fix

Alpha Section K 1 model Baxi Section K 2 models

Source

Information for the Section K 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