On my trial run in the van a few weeks ago, I had the usual issue with the Truma heating on electric which folks seem to talk about. Heat was cutting out on setting 5 on the stat at about the right temperature, but not coming back on. Higher settings resulted in a sauna. I resorted to having it tick over on gas a couple of time despite EHU as I found the temp more manageable. Anyway, I found a couple of posts on this forum about about it and plenty of info on other forums about it. I'm pretty confident about doing the job. One question is that on the Caravantalk forum they mention a sensor / kit from a bloke called Gary which is meant to be better than the Truma part. Does anyone have know where I can get this "Gary" sensor. Maybe Gary is also on this forum? Has anyone installed one of these sensors, "Gary" or otherwise?