BoilerFaultCodesRemeha E35 Fault Code
The Remeha E35 fault code means: your boiler has detected a problem with how gas is being controlled, meaning it cannot safely light or maintain a flame.. It appears on 3 Remeha models in our database.
Technical description: Gas valve error: check gas valve or wiring.
What causes the Remeha E35 fault?
This fault occurs when the boiler's control board sends a signal to the gas valve to open, but the valve fails to operate or communicate back correctly. The most common reasons are a mechanical failure within the valve itself, a loose connection in the wiring, or a fault on the main circuit board that prevents it from sending the correct electrical signal.
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 E35 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha E35 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