How much does it cost to fix Biasi error code Er 14 +?

Typical repair cost for the Biasi Er 14 + fault is £120-350 including labour.

Er 14 + High

Biasi Er 14 + Fault Code

Q: What does the Biasi Er 14 + fault code mean?

Your boiler has detected that water isn't moving through the system properly or there is a lack of water pressure, causing it to overheat and lock itself for 10 minutes.

Also written as ER14 — same fault.

The Biasi Er 14 + fault code means: your boiler has detected that water isn't moving through the system properly or there is a lack of water pressure, causing it to overheat and lock itself for 10 minutes.. It appears on 2 Biasi models in our database.

Technical description: Faulty primary circuit (no water or absence of flow) (temperature in-crease > 2K/s) (the boiler can’t restart for 10 minutes)

Typical repair cost £120-350 (including labour)

DIY fix possible

Check the pressure gauge on the front of the boiler; it should be between 1.0 and 1.5 bar.If the pressure is low, use the filling loop underneath the boiler to top it up.Ensure all radiator valves and isolation valves under the boiler are fully open.Bleed your radiators to remove any trapped air that might be blocking water flow.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Biasi models that show the Er 14 + fault code

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

Source

Biasi Er 14 + 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