How much does it cost to fix Biasi error code Faulty condensate drainage?

Typical repair cost for the Biasi Faulty condensate drainage fault is £80-140 including labour.

Faulty condensate drainage High

Biasi Faulty condensate drainage Fault Code

Q: What does the Biasi Faulty condensate drainage fault code mean?

Your boiler has stopped working because the pipe that carries away excess liquid is blocked or frozen, causing water to back up into the unit.

Also written as FAULTYCONDENSATEDRAINAGE — same fault.

The Biasi Faulty condensate drainage fault code means: your boiler has stopped working because the pipe that carries away excess liquid is blocked or frozen, causing water to back up into the unit.. It appears on 2 Biasi models in our database.

Technical description: Obstruction or fault in the condensate drainage system

Typical repair cost £80-140 (including labour)

DIY fix possible

Locate the plastic condensate pipe heading outside your property.Check if the end of the pipe is frozen and pour warm (not boiling) water over it to melt the ice.Restart the boiler once the blockage is clear and the liquid has drained.

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Biasi models that show the Faulty condensate drainage fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026