Scratching my head here with this.

[hammers4spanner]

HAve hot water cylinder that have changed the immersion. However have changed it over still not working. Have 240v going through the element and all seems correct but still no hot water

 

[townfanjon]

240 v going to it , or through it ?

 

[hammers4spanner]

To it

 

[townfanjon]

Proved 240 v not just a red light .. have you 240 coming out of the stat

 

[hammers4spanner]

Yes got 240v at stat

 

[Last Plumber]

You need to test L & N. Or test L to E and then N to E.
Sounds like a broken Neutral.

 

[townfanjon]

Have you a clamp meter pal , see if “its drawing “

 

[hammers4spanner]

It all started from power cut so a dodgy neutral could happen from that ?

 

[Last Plumber]

Depends on the power cut. If you loose Neutral it won't work.

 

[Sharp Point]

Is the new stat goosed?

 

[Best]

Did you check the immersion spur switch? Could be loose neutral wire there or can be inside the switch.
Remember the switch (2 pole) will have 2 switches actually inside and one of them can be faulty.
Also check at consumer unit or another switch that might be elsewhere.
Use a multi meter

 

[ShaunCorbs]

Easy way to tell at the stat

Live to neutral 240
Live to earth 240

Then test the element

 

[Burger]

Did you check the immersion spur switch? Could be loose neutral wire there or can be inside the switch.
Remember the switch (2 pole) will have 2 switches actually inside and one of them can be faulty.
Also check at consumer unit or another switch that might be elsewhere.
Use a multi meter

Would that still give him 240v to immersion?

 

[Burger]

HAve hot water cylinder that have changed the immersion. However have changed it over still not working. Have 240v going through the element and all seems correct but still no hot water

Might be a stupid question but, you have left it long enough to heat up? And turned the immersion stat up?

 

[hammers4spanner]

Easy way to tell at the stat

Live to neutral 240
Live to earth 240

Then test the element

Done that and tested the element 19.3

Left it for 30 mins and was stone cold .

Must be something deeper caused by power cut

 

[ShaunCorbs]

Done that and tested the element 19.3

Left it for 30 mins and was stone cold .

Must be something deeper caused by power cut

Volts ?

 

[Best]

Would that still give him 240v to immersion?

If neutral not going to immersion then would only get 240v at live to earth test.

 

[Burger]

Done that and tested the element 19.3

Left it for 30 mins and was stone cold .

Must be something deeper caused by power cut

And you defo have the immersion stat turned up?

 

[Burger]

Volts ?

Ohms one would think

 

[townfanjon]

Ohms test on a immersion heater is a waste of time IMO

 

[Burger]

Ohms test on a immersion heater is a waste of time IMO

Any reason? I thought this proved if the element was good or not?

 

[townfanjon]

Any reason? I thought this proved if the element was good or not?

I used to subby for Kingspan , in my experience they work or they dont , I have put them in with ridiculously low or high readings and they still work.
If anything if they didnt read right they tended to be noisy , poor insulation I think .
Golden rule with any immersion heater as the ultimate test , wire it up to a plug and put it in a socket, if it works you look towards stat, programmer , spur switch etc etc.

 

[Rob Foster]

bypass the stat wire it direct and see if it heats up a bit then
centralheatking dont leave it on too long or unattended
centralheatking

 

[quality]

if the immersion is 19 odd ohm then thats around 12 ish KW which means it ok. I would be looking at the integrity if the wiring. The golden rule with electrical work is knowing what your doing

 

[hammers4spanner]

I used to subby for Kingspan , in my experience they work or they dont , I have put them in with ridiculously low or high readings and they still work.
If anything if they didnt read right they tended to be noisy , poor insulation I think .
Golden rule with any immersion heater as the ultimate test , wire it up to a plug and put it in a socket, if it works you look towards stat, programmer , spur switch etc etc.

Good idea that

 

[townfanjon]

Good idea that

Doubt if its imm heater pal , its going to by wiring or most probably stat .

 

[Millsy 82]

What I would do is 240 L-N and 240 L-E if that's good then turn power of check for continuity across thermostat (or overheat stat as sometimes seperate)

If all of those are ok then faulty immersion.

My guess is the stat as they are shocking.

 

[Chalked]

Has the stat got an overheat?

 

[fixitflav]

if the immersion is 19 odd ohm then thats around 12 ish KW which means it ok. I would be looking at the integrity if the wiring. The golden rule with electrical work is knowing what your doing

240V/19ohm = 12amp, not 12kW. Power = 240^2/19 = 3kW, about right for an immersion.

 

[quality]

240V/19ohm = 12amp, not 12kW. Power = 240^2/19 = 3kW, about right for an immersion.

thats what i meant lol

 

[fixitflav]

thats what i meant lol

Thought so

 

[Rob Foster]

As above wire it to a plug, plug in to a known good supply with extension lead, see if it works, then wire the stat in see if it still works. Then report back
Centralheatking

 

[steadyon]

As chalked said above, check to see if the immersion heater has an overheat thermostat. This is an additional thermostat beyond the one you can use to set the temperature. The overheat thermostat will trip if the temperature goes too high (85 + degrees) and does NOT reset itself. You have to push in a button, often through a small hole, to reset it.

 

[gmartine]

You've replaced the element. As well as the reset, check continuity across the stat.

 

[Burger]

HAve hot water cylinder that have changed the immersion. However have changed it over still not working. Have 240v going through the element and all seems correct but still no hot water

Did you manage to sort this?