Er 07 Medium

Biasi Er 07 Fault Code

Also written as ER07 — same fault.

The Biasi Er 07 fault code means: your boiler is struggling to accurately measure the temperature of the hot water it provides, which has caused it to stop heating your water to prevent overheating.. It appears on 3 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: Faulty d.h.w. temp. probe NTC
Typical repair cost £120-180 (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 Er 07 fault code

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

Source

Biasi Er 07 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 7 July 2026