What does the Baxi E.04.15 fault code mean?

Your boiler has stopped working because the pipe that carries exhaust fumes outside is likely obstructed or blocked by debris.

How much does it cost to fix Baxi error code E.04.15?

Typical repair cost for the Baxi E.04.15 fault is £80-180 including labour.

Check the external flue pipe outside your home for any visible obstructions like bird nests, leaves, or snow

Manufacturer manual

Flue gas exhaust pipe blocked

From this model's manual

Verified against the Baxi/Baxi 818 System installation & service manual.

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

Boiler cover options

A cover plan would handle faults like E.04.15: no call-out fees, no surprise bills.

Approved partner

Domestic Appliance Guard

Unlimited call-outs, 24/7 helpline, no price-hike promise

Affiliate links. We may earn a commission at no extra cost to you.

Seeing a different code? Every code this model can display, in one place.

Six most common causes of dropping pressure.

Each noise points to a different fault.

7 signs repair isn't worth it anymore.