What's inside a glow worm cxi 30, full strip down/repair and review of the combination boiler.

Derek in this video takes a look at the glowworm cxi 30. this video is a re- upload which has had the music removed and been re-edited. In the video Derek strips the boiler and reviews how easy or hard it is to work on and also shows how to test NTC resisters and how the diverter valve works.