What does the Main E1 fault code mean?

Your boiler has failed to light or cannot detect that the flame is burning, so it has shut down as a safety precaution.

How much does it cost to fix Main error code E1?

Typical repair cost for the Main E1 fault is £100-280 including labour.

Check if other gas appliances in your home, like a hob, are working to ensure gas is being supplied.

Ionization fault (no flame signal)

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.

7 signs repair isn't worth it anymore.