What does the 'SE', 'D5' code or slow flashing blue light mean on my Greenstar CDi?

This is a feature of certain CDi boilers - it’s a reminder that the boiler requires a service every 12 months. The code is activated after 2,324 of burner hours.

The code can be cleared by following these instructions:

Resetting your boilers SE code

Or watch the video below to see a demonstration of some Greenstar boiler handy checks, such as how to reset the boiler and how to check the boiler’s pressure.

View more boiler videos