Medium
90˚C on Biasi Activa

Your boiler is overheating because the water inside is getting too hot, causing it to automatically turn down its power to prevent damage.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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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

Primary circuit temperature over 90°C (useful output is automatically reduced)

DIY fix possible

Check that all radiator valves are fully open to allow water to flow.Ensure the boiler pressure gauge is between 1 and 1.5 bar.Reset the boiler using the control knob to see if the fault clears.

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