BoilerFaultCodesBaxi 3.2.4 Fault Code
Also written as 324 — same fault.
The Baxi 3.2.4 fault code means: your boiler has detected a blockage in the pipework that carries away waste water, which is preventing it from operating safely.. It appears on 1 Baxi model in our database.
Technical description: Contedensed darin
DIY fix possible
Locate the plastic pipe exiting the bottom of the boiler that leads to an outside drain or internal waste pipe.Check the external end of the pipe for blockages, ice, or debris.If the pipe is frozen, gently pour warm (not boiling) water over the outside of the pipe to thaw it.
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Baxi models that show the 3.2.4 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 3.2.4 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 7 July 2026