How much does it cost to fix Baxi error code DHW Flow Switch section?

Typical repair cost for the Baxi DHW Flow Switch section fault is £120-190 including labour.

DHW Flow Switch section High

Baxi DHW Flow Switch section Fault Code

Q: What does the Baxi DHW Flow Switch section fault code mean?

Your boiler is failing to detect when the hot water is turned on, meaning the system won't fire up to heat the water for your taps.

Also written as DHWFLOWSWITCHSECTION — same fault.

The Baxi DHW Flow Switch section fault code means: your boiler is failing to detect when the hot water is turned on, meaning the system won't fire up to heat the water for your taps.. It appears on 2 Baxi models in our database.

Technical description: LED 1: Flash, LED 2: On, LED 3: On, LED 4: Off

Typical repair cost £120-190 (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 DHW Flow Switch section fault code

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

Source

Baxi DHW Flow Switch section 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