E19 Medium

Biasi E19 Fault Code

The Biasi E19 fault code means: your boiler's hot water sensor has failed or has a wiring fault, meaning the system cannot accurately measure the temperature of the water coming out of your taps.. It appears on 4 Biasi models in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: D.H.W. NTC probe error (short circuit / open circuit)
Typical repair cost £90-160 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Biasi models that show the E19 fault code

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

Source

Biasi E19 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