immersion heater failed after 4 months

[Matt0029]

Is there any reason other than poor element. Why an immersion heater would fail 4 months after fitting on an unvented cylinder? Apparently it has power too it etc. Thanks. It isn't the original one either.

 

[ShaunCorbs]

Overheat tripped ?

 

[Matt0029]

The over heat on the immersion?

 

[ShaunCorbs]

The over heat on the immersion?

Yes

 

[Matt0029]

Yes

It's a direct cylinder. Any reason why may trip. Other then temperature setting on it being too high? Thanks. Had a quick read mentioned lose wires etc

 

[Murdoch]

If it’s the over heat tripping, turn the temperature down ?

 

[Matt0029]

Are the reset buttons still under the cover of the immersion. Like on the older models?

 

[king of pipes]

Could be various reasons but a tripping immersion needs addressing, is it timed to use economy 7 ? Is there 2 immersion heaters fitted could they both be on ? , Temperature setting to high ? , As you said a wiring issue ? . Kop

 

[John.g]

Check the element resistance, if its not failed then should read ~ 20 ohms.

 

[Ben-gee]

If it’s the bottom element on an economy 7 cylinder it could be sitting in scale- heat can’t dissipate so it trips.
However if it’s only four months old this in unlikely, unless the scale wasn’t removed when the immersion was fitted.

 

[Matt0029]

Check the element resistance, if its not failed then should read ~ 20 ohms.

Thanks between live and neural?

 

[John.g]

Ensure power switched out, remove immersion cover and check resistance across element, if unsure, post a photo with cover removed.

 

[Matt0029]

Ensure power switched out, remove immersion cover and check resistance across element, if unsure, post a photo with cover removed.

Thanks and should be 20ohms if correct? Also is the reset button usually under the cover on the newer elements?

 

[John.g]

Around 20 ohms or so, if the element is failed then infinity ohms, open circuit.
Don't know where reset will be.

 

[Matt0029]

Any chance it could be a cylinder stat. Problem. Is a direct cylinder so not should if just works on the immersion stat. As the immersion usually a standard size? I have my unvented etc but have manily just installed new.

 

[John.g]

Could be the stat, a multimeter will soon establish what's wrong.

 

[Matt0029]

Could be the stat, a multimeter will soon establish what's wrong.

Thanks you test the resistance on the immersion from neutral to the element thermostat point?

 

[John.g]

Can you post a photo of the immersion with the cover removed, can then advise of the appropriate tests.

 

[Last Plumber]

I am unclear whether you are saying it has overheated and tripped the HLS (High Limit Stat), or whether it stopped working and you are trying to find the reason?

Is this for you or a customer?

The element with live and neutral disconnected should read around 19 Ohms or there and there about.

There should be live to it and neutral from it.

There should be continuity through the HLS and the control/temperature stat should open and close dependent on temperature.