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

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

Section K High

Baxi Section K Fault Code

Q: What does the Baxi Section K fault code mean?

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.

Also written as SECTIONK — same fault.

The Baxi Section K fault code means: 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.. It appears on 2 Baxi models in our database.

Technical description: Selector switch or PCB fault (Reset position functionality)

Typical repair cost £180-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Baxi models that show the Section K fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Baxi Section K fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026