Fusion Comet No Power / Over Heating

In this video we talk through the diagnostic procedure for an EHC electric boiler which has no power due to the WT-3 high limit thermostat tripping. The boiler in the video is the Fusion Comet System Boiler however the points discussed can be adopted across other models in our range. Please note that the electrical tests in this video have been carried out on a single phase boiler, 3 phase boilers have a different procedure which will be demonstrated in a future video.
Warning: These videos are intended to assist Competent Engineers and the contents of these videos should not be attempted by home owners or unqualified persons.