How much does it cost to fix Baxi error code L2?

Typical repair cost for the Baxi L2 fault is £120-200 including labour.

L2 High

Baxi L2 Fault Code

Q: What does the Baxi L2 fault code mean?

Your boiler has stopped working because it cannot measure the temperature of the water flowing through it, meaning it doesn't know when to turn the heat on or off.

The Baxi L2 fault code means: your boiler has stopped working because it cannot measure the temperature of the water flowing through it, meaning it doesn't know when to turn the heat on or off.. It appears on 1 Baxi model in our database.

Technical description: Flow Thermistor Fault

Typical repair cost £120-200 (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 L2 fault code

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

Combi 130 HE Repair: £120-200

Source

Baxi L2 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

Baxi Combi 130 HE manual (PDF)

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026