What does the Heatline E03 fault code mean?

Your boiler has detected that the exhaust gases are too hot or cannot escape properly, so it has shut down for safety.

How much does it cost to fix Heatline error code E03?

Typical repair cost for the Heatline E03 fault is £120-250 including labour.

Flue gas temperature sensor fault: The flue thermostat or sensor has detected an obstruction or excessive temperature in the flue.

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

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.

7 signs repair isn't worth it anymore.