Burner lights then goes out — Flue problem or combustion issue

What does Burner lights, then goes out mean?

The boiler's burner ignites successfully but then quickly extinguishes, failing to provide continuous heat for either hot water or central heating.

• A problem with the flue system, such as a blocked air inlet preventing sufficient oxygen
• The inner flue leaking exhaust gases back into the air inlet

Click steps to track your progress.

1. 1

   Reset the boiler using the user control panel.

2. 2

   Visually inspect the flue terminal outside the property for any obstructions like debris, leaves, or bird nests.

3. 3

   Ensure nothing is obstructing the air vents around the boiler (if applicable).

4. 4

   This is a safety critical issue; if the problem persists, a qualified service engineer must inspect the flue system immediately.