Heatrae Megaflo DD210 Problem

[nad000]

Hi
i have a megaflo DD210 direct cylinder, i think that one of the immersion elements has packed in, about 8 years old, i have 2 switches on the wall with red neon lights with each element connected to them, the switch for the lower one is not lighting up and when you touch the cover on the element it is cold..... anyone with any experience on this please....

thanks

 

[londonboy]

Do you have storage heaters and are they working?
Have you checked the fusebox for any blown fuses?

 

[nad000]

storage heaters are working fine, the hot water is working also but not as it should, have checked the fusebox all seems ok.

 

[Hugh Jaleak]

If its working on Economy 7, the bottom immersion wont come on until 01.00hrs tomorrow. I think you need to check there is power at the immersion during the off peak hours before condemning the immersion.

 

[keego]

Check the overheat hasn't tripped on the stat, it's a little button on the right hand side of the dial marked 1 to 5 which will push in with an audible click if it has tripped. Although that would't affect the neon on the fused spur, check the output from the spur as it may be faulty.

 

[wetshoes]

Do as Hugh Jaleak says,
and if you are getting power ok during off peak times, test the resistance across the immersion element pins - between 18 and 20 ohms is a fairly good indication element is ok - below this and element is either shot or on way out soon.

If element tests ok then look at replacing safety stat.

regards