What does the Baxi E4 fault code mean?

Your boiler is struggling to light and stay on, which might be caused by trapped air in your heating system stopping the water from flowing properly.

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

Typical repair cost for the Baxi E4 fault is £90-280 including labour.

Switch off the boiler and wait for the radiators to cool down

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.