Truma Water Heater Problems!

It’s been such a long time since my last post…..time has really flown by and it’s not until the Christmas break that I’ve had some free time. Motorhome life has been far from smooth recently for a number of reasons. In August my Truma Water Heater developed a leak that is still causing me problems today.

Truma Water Heater Problems

I first noticed the problem when the carpet near the boiler door seemed to be wet. On taking a closer look I noticed that water was dripping from the hot water outlet connection. A call to Truma UK revealed that the part had changed in the late 90’s and I would need to give them the boiler serial number. Naturally, mine was the older boiler and the part number I needed was 34000-55600 which had been phased out. The newer part number for the newer boiler was 34150-01.

Truma Water Heater Problems

Truma Part 34000-55600

I asked Truma what I was supposed to do as it seemed totally unfair to have to buy a new boiler costing hundreds of pounds just because a small piece of plastic had failed! The advice given was pathetic, apparently I should visit a plumbers merchants and get them to try and make something up. Shocked at the poor customer service offered by Truma UK I decided to email Truma Germany but their reply, whilst apologetic was equally unhelpful.

Taking the old part to a plumbers merchant they tried to replicate the fittings in metal and whilst it did fit, neither they or I truly understood the significance of the thinner pipe that points up which I now know to be the breather tube. If you blow into this Truma Water Heater part you will discover that most air rushes down the larger pipe and the thinner pipe has some valve built inside that only opens in the event that pressure builds up too much inside the boiler, a safety feature.  The plumbers merchant did not know this and failed to replicate this valve meaning that when I activated a tap water would simply head up and out of the overflow through the pipe that exited the vehicle underneath.

Truma Water Heater

After this initial failure I decided to buy the newer part to see up close how they differed. Whilst the older part is a screw type the newer is considered to be a push type. However if you discard some of the parts from the new part you effectively have something that looks quite similar to the old part. At least the thread that connects to the boiler is the same and the existing hoses would also fit the hot water and overflow pipes. With the new part fitted however the pipes barely cleared the boiler casing so I could not connect hot water outlet or overflow pipes. A further trip to a plumbers merchant and after buying a 1/2 inch BSP male to female extender and applying some plumbers paste and tape the new part was fitted. As luck would have it once it was screwed tight the pipes lined up perfectly.

This repair seemed to have worked but some weeks later water began to leak again. This time I purchased two parts for the Truma water heater and set about trying again. Until now it seemed to have worked but today again it began leaking. I could try and fit the final spare part I ordered in the hope I will get a few more months from it but I think I will speak to a relative who is a plumber to see if there is any other solution. I certainly don’t see why I should buy a new Truma water heater when the actual boiler works fine. Shame on you Truma for not supporting your water heaters for longer!


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About Gary Box

Author: Gary Box.

Gary decided for a complete change of lifestyle late in 2009 which resulted in him buying a Hymer motorhome to live in and starting the Motorhome Vagabond blog. A tour of Europe followed in 2010 and he still writes about his adventures.

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Comments

  1. I’m still some how using my 27 year old cascade carver water heating in my conversion and it’s still going strong! Nice blog.

  2. Great blog mate, sounds like you had some issues sorting out that leak, hope all is well now.

  3. Having just read your unfortunate experiences with your Truma water heater, I am currently filled with unbridled joy (I don’t think).Whilst on holiday mt water heater also began to leak from the same place, as yet I haven’t looked at it to assess repair. If I have any revalations while repairing I will write here as to anything that might be useful to pass on

  4. Gary Box says:

    Hi Bert,

    Sorry to hear about your problems. If you have the same type of boiler as me (the older type) you will find that plastic part impossible to find and Truma will not be very helpful. Since the boiler itself was working fine I did not want to spend money on a new one and have since managed to fix the issue. The newer part can actually be adapated to fit. I have a relative who is a plumber and he gave me some parts that allowed me to use the newer part. It’s some extra cabling and might not look as attractive but it does the job perfectly and does not leak and that’s all I’m concerned about. It was also a cheap fix which you cannot complain about in the current economic climate.

    If you want to know more let me know. I could photograph the boiler and tell you what parts he gave me to adapt it.

    Cheers
    Gary

  5. I tried to fill my truma water container after not having used it for a while and the water is just running straight out. Can anyone help?

  6. Hi Tony,

    Did you manage to sort out the problem? When you say ‘running straight out’ do you mean out of the overflow and under the vehicle? It’s hard to say without seeing your vehicle but if you have the same boiler as me it might be the part I had to replace.

    Good luck
    Gary

  7. Tony Oliver says:

    If Tonys is the same Truma water heater that you (Gary) appear to be talking about, then its possible that the ‘Frost’ safety valve has operated (this can happen either thru a drop in temperature, through driving over particularly rough terrain, or because the power to it has been disconnected – there is a switch adjacent to the safety valve which removes power to it when working on it). This valve empties the heater through a drain pipe through the van floor. It can be reset by a push button next to the valve, providing there is power to the valve. On a different point Gary, my experience with Truma was similar to yours. I demounted the system and took it to a Truma agent for repair which he managed o do after sometime, but it came back saying they couldnt guarantee the repair and further repairs would not be possible due to lack of spares. Working it out for usage ( I am not a fulltimer and this is a 1995 van which I have owned since 2000) , and taking into account the fact that often I will boil a kettle rather than wait for the full boiler to heat up when requiring water, and will augment the space heating element of the boiler when hooked upto mains power, the boiler has probably only been used for 432 hours or 18 full days since new! Trumas Customer Loyalty sucks! On a further note I fixed the 5th gear problem for £350 – I left a comment.

  8. Andy Twose says:

    I broke the elbow from the top outlet of my C3400 boiler. No parts available, of course but I found this thread and was inspired to know that the later hot water elbow could be contrived, one way or another, to fit the older C3400 boiler.
    I purchased a 34150-01, and found one in grey with the connections at 180 degrees. Most seem to be red with connections at 90 degrees.
    I kept the new elbow intact without dissassembly and made up a 1/2″ BSP to 10mm pipe reducer. The new 3415-01 elbow then clamped straight onto the 10mm pipe. Cost of brasswork about £5 and 15 mins work. Image available if required.
    Andy

  9. Hi Andy,

    Thanks for the comment. I’ve had lots of people contact me about these outlets for boilers. It seems Truma don’t care when the part fails but the newer style part can often be adapted to work with the older boilers. If you want to submit a photo please do as it might help others with a similar system to yours.

    Thanks for the comment
    Gary
    The Motorhome Vagabond

  10. Richard Pearson says:

    Have just used my 2009 Arapoho since the Winter break. Refilled the water system and found that the Truma water heater will now not heat up on the electric function, only by using it on gas will give me hot water. No fuses are blown so am puzzled what the fault could be??

  11. I’ll leave your comment in case someone can assist but my boiler was gas only so can’t really help myself. Hope you find the problem.

    All the best
    Gary
    The Motorhome Vagabond

  12. Andy Twose says:

    Gary, where would I upload an image ?

  13. Andy Twose says:

    Richard Pearson….I too had my 240v heater fail on me. It is a separate heating element held in place in the bottom of the boiler with 2 screws. I thought the element itself had gone as it was open circuit when measured between Live and Neutral with an ohmmeter. But I was puzzled as to how it could turn off as it is supplied with just the switched mains so having removed the electric heater I decided to chisel out all of the resin where the cable goes in. I found a thermostat and a thermal fuse and exposed the ends of the element which measured OK. I rebuilt it all with a 60 degree thermostat and 125 degree (I think) thermal fuse and refilled it all with black high temperature silicone. Voila…mains hot water again. Bit fiddly and not recommended for someone not competant but it is doable. I am comfortable with what I have done. I was seriously considering a new boiler. Shame Truma don’t just have spares. Pretty pathetic really.

  14. Hi Andy,

    If you want to send me the image I’ll add it to article if you like.

    Thanks
    Gary

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