What does the Baxi E4 fault code mean?

Your boiler is struggling to light correctly, which may be caused by trapped air in the system or an issue with the gas supply.

How much does it cost to fix Baxi error code E4?

Typical repair cost for the Baxi E4 fault is £80-250 including labour.

Check that your gas pre-pay meter has credit (if applicable)

Ignition failure – try bleeding your radiators

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.

Safety-critical — turn off, read this.