BoilerFaultCodesRemeha E13 Fault Code
The Remeha E13 fault code means: your boiler's internal computer has encountered a communication or hardware malfunction and cannot operate safely.. It appears on 9 Remeha models in our database.
Technical description: Internal control unit error
What causes the Remeha E13 fault?
This fault occurs when the boiler's main control board suffers a critical internal communication failure or a hardware malfunction. It basically means the 'brain' of the boiler can no longer process data or send instructions to vital components like the gas valve or fan. The most common reason is the natural degradation of electrical components on the circuit board or loose connections within the internal wiring harness.
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 E13 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha E13 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