E Emergency

Main E Fault Code

The Main E fault code means: your boiler has detected an issue with the gas supply to the burner, meaning it cannot safely light or stay ignited.. It appears on 2 Main models in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Gas at burner / gas valve check
Typical repair cost £150-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Main models that show the E fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Main E fault code information on this page is sourced and cross-checked against the official Main service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026