Immersion heater hot water fault

[2DIYorNOT2DIY]

hi,

I have a fully electric hot water system with a seperate tank for cold and hot water. The hot water one has 2 immersion heaters, 1 off-peak supply and 1 peak supply.

The off-peak supply is always turned on and rarely if ever use the peak supply.

A few days ago i noticed the hot water from the tap was extremely hot and the cold water from the tap was warm-hot. I checked the cold water tank and this was warm.

I have turned off the power supply and drained the cold water tank and this has sorted out that problem, however I dont know what the problem with the off peak immersion heater is. It works when I turn it back on and begins to heat the water but fails to auto switch off. It even works during peak hours if I turn it on.

Is it broke and does it need replacing?

It would appear that it does not switch off regardless of time or temperature. It is a THERMTEC LTD immersion heater 3KW 50hz if that means anything.

Any help would be great. Thanks.

 

[swidders]

How do you know that it's off-peak?

Two problems here - if offpeak, then the electricity supply should cut out

If overheating, it's the thermostat - see http://www.diydata.com/problem/immersion/immersion_heaters.php for diagrams of how to change it.

 

[Metasis]

I have a better solution, before you electrocute yourself or your children, switch off the power (As you have done already, well done!) and call a qualified plumber or electrician.

 

[John506]

I have a better solution, before you electrocute yourself or your children, switch off the power (As you have done already, well done!) and call a qualified plumber or electrician.

You have 4 posts, I've read 2, and they are both very sarcastic & unhelpful, can I ask your reason for registering?

And yes I know, it's a free world, and you can do as you like, but you may find this is a nice, friendly forum.

 

[2DIYorNOT2DIY]

Swidders, thank you for that info it has been very helpful. It is the thermostat that has gone as it is just overheatingand does cut out when off peak hours end.

Metasis, dont plan on electrocuting myself and am aware how to turn off electricity without it flowing to the heater there should be no danger or electrocution!! Have been assured by someone who has done it before that it is a fairly simple job and wont cost a lot if I keep the plumbers away!! Thanks anyway though.

Thank you DIYNOT.COM