Abacist
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  • I am now wondering if there is anything wrong with the unit at all and how I can check that both elements receive voltage? I would greatly appreciate your knowledge and input please? Many thanks. Robert
    Abacist
    Abacist
    I was lucky that both were dud & there were no other issues as I know nothing of electronics. Have you checked that the unit is not working? Can you plug in on the drive to test it? I no longer have that van with a Truma so can't do any comparisons for you. There are far more experienced members so don't be afraid to ask about your problem. Good luck!
    Hi,
    I read your strip down post with much interest. We had a hab check done recently and the engineer reported that one of our elements was not working. How he deduced this without taking the Truma to bits I don't know. Anyhow, took his word for it. I have now got the unit out and removed the end cover. I have measured the resistance and both read 58 ohms which probably means they are both okay, (230*230)/900=58.
    I found your Truma boiler repair posting from April 16 2018 online so I joined this site to get more info and pictures. The problem now is that I cant find it on here. There is a posting from 26th April with no content I can find. Is it possible for you to send me the posting complete with the pictures as I am having the same problem as you
    Regards
    Just been avidly reading your Truma boiler repair posting, as I have the same issue, and hopefully will be attempting mine. Looking at your photos, do you think it would be possible to test/check the elements resistance, at the printed circuit board position (adjacent to where the mains wire connects)
    Abacist
    Abacist
    I am no electronics engineer so I don't know. I just think that testing other than on each end of the element introduces other cables, circuits etc into the test that might confuse matters. I would have no idea where on the PCB to conduct such a test anyway! Sorry to be pessimistic!
    My Truma boiler has frozen and has a little bit inflated, so there is no space between the boiler and the fins on some points. I bent the fins on theese points to create some space there. But then I noticed that the plate is touching the boiler too, because the boiler has inflated there too. I don't know the reason, why the plate is there and if it has/hasn't touch the boiler or the fins.
    Best Regards.
    Karel
    Abacist
    Abacist
    Hi @KP I am no expert but I think you need as little space between the heating elements and the fins as possible just so you can slip the elements in but without having to knock them otherwise the heat will not get to the fins to do their work. I hope I have understood your point!
    Hello, I have read your great thread about disassembling Turma combi. I have a question of the image https://www.motorhomefun.co.uk/forum/media/img_3480.22866/. Do you have any idea, why there is the plate above the fins? Does the plate touch the fins, or is there some space between? Or does the plate touch the boiler?
    Abacist
    Abacist
    Karel - I have no idea why the plate is there other than to say that when the boiler is put back together the plate sits at the bottom of the boiler so perhaps its job is to reflect the heat upwards towards the jacket of water around the boiler surrounded by its fins, thereby making the distribution of the heat better?
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