Medium
Pr 29 on Biasi Advance 25C

Your boiler has detected an issue with the sensor that monitors the temperature of the cold water coming into the unit, which can affect its ability to heat your water correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Presence of domestic cold water temp. probe or set of inlet cold water with solar control

Engineer required

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

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Related fault codes

Er 06View →Er 05View →

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