How much does it cost to fix Biasi error code E31?

Typical repair cost for the Biasi E31 fault is £90-250 including labour.

E31 High

Biasi E31 Fault Code

Q: What does the Biasi E31 fault code mean?

Your boiler is having trouble communicating with your thermostat or remote controller, meaning it can't receive the signal to turn the heating on.

The Biasi E31 fault code means: your boiler is having trouble communicating with your thermostat or remote controller, meaning it can't receive the signal to turn the heating on.. It appears on 2 Biasi models in our database.

Technical description: Remote control communication error

Typical repair cost £90-250 (including labour)

DIY fix possible

Check if the batteries in your room thermostat or remote control need replacingEnsure the wireless receiver or thermostat is within range and hasn't been movedTurn the boiler power off at the fused spur, wait 30 seconds, and turn it back on to reset the connection

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Biasi models that show the E31 fault code

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

Source

Biasi E31 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