BoilerFaultCodesRemeha 13 Fault Code
The Remeha 13 fault code means: your boiler's internal computer has encountered a critical error and can no longer control the heating system safely.. It appears on 2 Remeha models in our database.
Technical description: Control box failure
What causes the Remeha 13 fault?
This fault occurs when the boiler's main electronic brain suffers an internal hardware failure, preventing it from processing instructions. It is usually caused by electrical wear and tear over time or a communication breakdown between the internal circuit boards. Because the boiler can no longer monitor safety sensors or manage the flame, it shuts down completely to prevent damage.
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 13 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha 13 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