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Subject Topic: Truma water heater Post Reply Post New Topic
Message posted by Manty10/1/2022 at 2:39pm
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Bathrrom rip out causes showers to be had in van. 2007 van, The water heater on electric, it heats up a little then trips out. I then have to reset it. On gas it works fine. Talked to Truma who say it could be the element or temp sensors. If it were the temp sensors would it not cut out on gas too? If element, is it a reasonable job to rmove.
Advice appreciated. Sorry if this has been raised before but I could not find!

Message posted by birdman101 via mobile 10/1/2022 at 7:52pm
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Look on YouTube truma heatstore. Element change.

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Now 49 year Caravanning completed.

Message posted by Manty10/1/2022 at 9:21pm
Outfit:  Coachman Amara 520 4 Kia Sorento XS     Location:  East Anglia
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found it on utube but can it be tested in situ?

Message posted by Pickled Onion11/1/2022 at 12:07pm
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When you say it trips and you reset it, do you mean it trips the RCD? the the special trip in the mains box with circuit breakers or a thermal one?

If it trips the RCD after a while it's likely to be that the element shorts internally to earth due to thermal expansion, a new one will therefore be required but they are very very expensive for what they are, essentially a kettle element.

Testing with specialist equipment like a Megger may well show a fault as it uses a much higher test voltage than a simple multimeter. If you do use a megger, disconnect the element from the rest of the circuit so that you don't fry the delicate components on the PCB.

If it's the thermal cut-out that is tripping, it is likely to be faulty. It could be a local hot spot on the element, that's unlikely but if so, new element too.

Dave.

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Teach a man to fish and you can get rid of him for a whole weekend.

Message posted by Manty11/1/2022 at 5:45pm
Outfit:  Coachman Amara 520 4 Kia Sorento XS     Location:  East Anglia
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Thanks pickled onion. No it does not trip the RCD and the on light stays on. It just stops heating the water so i switch off the mains input and the circuit breakers, leave for a while and switch on and it heats again.....only once! Have looked on utube and there is mention of the NRV being faulty. Wiull check that.


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