BoilerFaultCodesRemeha E38 Fault Code
The Remeha E38 fault code means: your boiler's internal computer parts are struggling to talk to each other correctly, which has caused the system to stop working.. It appears on 6 Remeha models in our database.
Technical description: Communication error
What causes the Remeha E38 fault?
This fault occurs when the boiler's main control board loses its electronic connection with the display or other internal components. The most common reason is a loose or damaged wiring loom between the parts, or a hardware failure on the circuit board itself that prevents signals from being sent. Because the components cannot 'handshake' to confirm everything is safe, the system shuts down for protection.
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 E38 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha E38 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