BoilerFaultCodesRemeha 16 Fault Code
The Remeha 16 fault code means: your boiler's internal computer brain has developed a critical fault and is unable to manage the system safely.. It appears on 2 Remeha models in our database.
Technical description: Control box failure
What causes the Remeha 16 fault?
This fault occurs when the boiler's main electronic circuit board suffers a hardware failure or a memory error, preventing it from processing safety data. It is often caused by long-term heat exposure degrading the electrical components or a sudden power surge that damages the sensitive microprocessors. Effectively, the boiler can no longer trust its own internal instructions and shuts down to prevent an accident.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Remeha models that show the 16 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha 16 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026