How much does it cost to fix Baxi error code L7?

Typical repair cost for the Baxi L7 fault is £150-300 including labour.

L7 High

Baxi L7 Fault Code

Q: What does the Baxi L7 fault code mean?

Your boiler has detected that hot water cannot flow through it properly, so it has shut down to prevent damage to its internal parts.

The Baxi L7 fault code means: your boiler has detected that hot water cannot flow through it properly, so it has shut down to prevent damage to its internal parts.. It appears on 1 Baxi model in our database.

Technical description: Dry Fire Fault (DHW circuit blocked)

Typical repair cost £150-300 (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 L7 fault code

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

130 HE (range) Repair: £150-300

Source

Baxi L7 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