tempremental 240 V water heater Truma 8 years old. (1 Viewer)

[mohawkman]

I am having trouble with the water heat side of my truma on mains. Sometimes it works and then after a while it shuts down and when it has "had a rest" it decides to work. Looking at a replacement element on line i see they have a thermostat in circuit with the element all in one. I am wondering if that is getting so it switches off the element at temperature selected and is then lazy in resetting. I feel sure there has been a thread on here re de scaling the system and wonder if first point of contact would be to do this. Any suggestions welcome. I am quite capable of removing the stat and descaling to see if it improves things.

 

[Donkster]

I am having trouble with the water heat side of my truma on mains. Sometimes it works and then after a while it shuts down and when it has "had a rest" it decides to work. Looking at a replacement element on line i see they have a thermostat in circuit with the element all in one. I am wondering if that is getting so it switches off the element at temperature selected and is then lazy in resetting. I feel sure there has been a thread on here re de scaling the system and wonder if first point of contact would be to do this. Any suggestions welcome. I am quite capable of removing the stat and descaling to see if it improves things.

It's usually a sign of low gas pressure or 12v leisure battery running low. If you have a second gas bottle, try switching to that.

 

[headlight]

It's usually a sign of low gas pressure or 12v leisure battery running low. If you have a second gas bottle, try switching to that.

He's using 240v mains.

 

[Donkster]

He's using 240v mains.

So does it operate the same on 12 volt if it does then batteries maybe the issue

 

[headlight]

So does it operate the same on 12 volt if it does then batteries maybe the issue

How can batteries be the issue when he's running the water heater on mains ?

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[Donkster]

Just trying to help a fellow funster

 

[headlight]

Just trying to help a fellow funster

The OP has stated he has problems with his Truma hot water when on mains (240v) electric not when on gas and his hot water has no option to run on 12v so I don't understand your advice ?

 

[Landy Andy]

I am having trouble with the water heat side of my truma on mains. Sometimes it works and then after a while it shuts down and when it has "had a rest" it decides to work. Looking at a replacement element on line i see they have a thermostat in circuit with the element all in one. I am wondering if that is getting so it switches off the element at temperature selected and is then lazy in resetting. I feel sure there has been a thread on here re de scaling the system and wonder if first point of contact would be to do this. Any suggestions welcome. I am quite capable of removing the stat and descaling to see if it improves things.

When you say reset it. What do you do?

The heater tends to heat water very very hot. It should be 60 degrees according to the dial, but it’s hotter than that. The water temp then needs to drop quite considerably before the element kicks in again to reheat.

 

[Donkster]

The OP has stated he has problems with his Truma hot water when on mains (240v) electric not when on gas and his hot water has no option to run on 12v so I don't understand your advice ?

My mistake somehow I thought it was the heating side