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 Topic: Truma Water Heater Element Replacement
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09/6/2014 at 10:26am
Location: Darlington
Outfit: Santa Fe & Bailey Unicorn Madrid
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Just resurrecting this old post to relate what happened to me when I replaced our heater element on Saturday.
The electric element stopped working last year for some reason. It was only about 1 year old at the time - had been replaced by Catterick Caravans to replace one that had blown.
Don't know why it had stopped working. Power supply to it was good, nothing was tripping and a test with a multimeter showed the element wasn't shorted out. I suspect there was something wrong the thermostat but I'll come to that.
Firstly a tip - don't rely on the drain valve on a Bailey Pegasus water system to drain the tank sufficiently. Use the pump to pump out the hot water tank otherwise you'll get a lot of water out of the hole when you withdraw the element!
Removal should have been easy but I discovered that the thermostat was only being held on by one nut and as such, it wasn't being held firmly against the side of the tank. Also, the solitary nut that was holding it on looked as though it had been tightened when it was very hot as it had melted the plastic lug on which it sits. In fact, it had melted into the lug and I had the devils own job trying to get a socket on it.
After a 30 minute struggle, got the thermostat off and removed the nuts securing the element. Pulled the element out a bit then spent the next 10 mins mopping up all the water that followed it  .
Next I found that the element would not pass through the hole - had to resort to brute force in the end to get it out. Compared to the new one, it was quite badly bent and distorted. Is that normal? Is that what happens to them after they have been used a bit?
Anyway, swapped over the electrical connection, fitted the new seal then inserted new element into the tank. It went in dead easy and was soon secured in place by the new nuts supplied.
However, you don't get new nuts for the thermostat which is crazy as they are the ones you are most likely to lose with them being so small. I dug the old nut out of the old thermostat and used that to secure the new one but it's not really secure and needs the other nut in place so have bought some from B&Q that look the right size for the stud. Will fit it next Saturday and hope all will be well.
So, if the thermostat is not being pressed against the tank enough, it won't be sensing the temperature correctly. Could this cause it to fail and prevent the heating element working?
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