BoilerFaultCodesRemeha E34 Fault Code
The Remeha E34 fault code means: your boiler's fan is not spinning at the correct speed, which means it cannot safely clear waste gases or bring in fresh air to stay lit.. It appears on 5 Remeha models in our database.
Technical description: Fan speed deviation
What causes the Remeha E34 fault?
This fault occurs when the boiler's internal computer detects that the fan is spinning too slowly or not at all, preventing the safe movement of air. The most common reasons include a buildup of dust and debris inside the fan motor, a loose electrical connection, or a component failure on the main control board. Without the fan functioning at the precise speed required, the boiler cannot safely ignite or exhaust waste gases.
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 E34 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha E34 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