BoilerFaultCodesWhat the manual says
Manufacturer manualDefault parameters. Automation settings. Replace boiler control unit.
From this model's manual
Verified against the Remeha Avanta Plus installation & service manual.
What causes this fault?
This fault occurs when the boiler's internal memory becomes corrupted and loses the essential factory settings required to run. The most common reason is an electrical surge or a terminal component failure on the control board that prevents the computer from reading its own software.
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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