High
Er 99 on Biasi Inovia 2020

Your boiler’s internal computer has forgotten which model it is, meaning it has lost its configuration settings and cannot operate.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Boiler type not set (parameter P 01 value 00)

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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