BoilerFaultCodesBaxi E161 Fault Code
The Baxi E161 fault code means: your boiler has detected a problem with the fan that clears away waste gases, causing the system to shut down for safety.. It appears on 2 Baxi models in our database.
Technical description: Fan error
What causes the Baxi E161 fault?
This fault occurs when the boiler's control board cannot detect that the fan is spinning at the correct speed to safely expel exhaust fumes. The most common reasons are a mechanical failure within the fan motor itself or a communication issue caused by a faulty circuit board and wiring. Without a functioning fan, the boiler cannot safely light the flame and will shut down immediately.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Baxi models that show the E161 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi E161 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