What does the Baxi E4 fault code mean?

Your boiler is struggling to light its flame, which could be caused by air trapped in your heating system.

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

Typical repair cost for the Baxi E4 fault is £100-280 including labour.

Check if your gas supply is turned on and other gas appliances are working

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.